COLORED DIAMONDS

GIA Colored Diamond Color Reference Charts
For colored diamonds, the element of shade a ways      diamond 4c  outweighs the other “C’s” (clarity, cut, and carat weight)
inside the willpower of cost. Therefore, it is crucial to understand the relationship of coloration appearances that affect colour grades and outlines. For the majority, color is an intuitive reaction instead
than a real know-how of the systematic ordering of color appearances. Both, but, are vital
while the romance of coloration additionally turns into the enterprise of coloration.
GIA has advanced this booklet of coloration reference charts to help the diamantaire, store, and consumer
understand the ways in which diamond color appearances transition and relate. Color is defined the use of
3 attributes: hue (the advent of crimson, blue, inexperienced, or anything in between), tone (the relative
lightness or darkness of a color), and saturation (the relative electricity or weak spot of a coloration). The coloration
look of a gem is the end result of a combination of those three attributes. By standardizing the
organization of these three attributes, a coloration’s look may be located in colour space. The manner in
which GIA organizes color is pondered in the tone/saturation charts on this booklet. Understanding this
employer will assist the reader grasp the relationship of GIA’s color grades and descriptions.
The review of GIA’s color grading terminology and method that follows become first provided in
the Winter 1994 Gems & Gemology article “Color Grading Colored Diamonds on the GIA Gem Trade
Laboratory.” G&G’s next articles on the grading and characterization of type IIb blue (Winter
1998), red (Summer 2002), and yellow (Summer 2005) diamonds discuss some of circumstances
encountered in shade grading which are crucial to gain consistent results. The reader is cited
these articles for greater data in this topic. All may be discovered in Gems & Gemology in Review:
Colored Diamonds (J. M. King, Editor, Gemological Institute of America, Carlsbad, CA, 2006), to
which this charts publication is a partner piece.
Following the evaluations of method and terminology are 3 hue circles. All 27 of GIA’s shades for coloured diamonds are represented on the primary hue circle. The diamonds proven are all of rather sturdy
saturation, where variations between colours are most comfortably prominent. The observer will word that
on this hue circle, extraordinary colorations reach their maximum saturation at distinctive tones (i.E., lighter inside the yellow hue and darker within the blue and violet colorings).
Unlike the first hue circle, the next two circles cognizance on specific tones. The second instance indicates
lighter tone and corresponds to grades of approximately Light to Fancy Light, at the same time as the third demonstrates darker tone and corresponds to Fancy Dark. The eye discerns fewer colorations at these extremes of
tone, wherein colorations do not attain excessive ranges of saturation. Therefore, the light and dark tone hue circles
show a smaller range of examples than the only at higher saturation.
The 3 hue circle charts are observed by means of a chain of tone/saturation charts. From our revel in
INTRODUCTION
2 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
grading hundreds of hundreds of coloured diamonds, we’ve got found out that they do not occur continually in the course of their coloration area. Therefore, we have selected to breed charts for colorings that the observer is much more likely to come upon and that occur in exceptionally huge ranges of appearances. The 8 consultant hues covered here are: yellow (hotter and cooler appearances), orange-yellow, yellow-orange,
orangy purple (orangy pink), pink (purple), purplish pink (purplish pink), blue, and yellow-green. By representing
a number of colorings around the hue circle, those charts illustrate the whole variety of appearance transitions in
warm and funky colorations.
Methodology
Colored diamonds are color graded within the face-up role best, in a grooved, matte-white, non-fluorescent plastic tray. The surrounding environment and ambient lighting are eliminated from the equation via using a viewing box that gets rid of distractions and shields external light. A preferred
geometry among the diamond, the light supply, and the observer is used for the visible evaluation.
The face-up colour is evaluated most constantly while the light source is positioned immediately above
the diamond and the observer perspectives the diamond approximately perpendicular to the table side. For
important shade evaluation, the observer should be mechanically tested for ordinary color imaginative and prescient.
When viewed face-up, a diamond’s appearance is based on a combination of its length, form, faceting
association, and color. GIA describes a single coloration as being “feature” of the diamond as a
complete. This function color is the general combination of appearances that is not apparent surface reflection, dispersion, windowing, or extinction.
Once the characteristic coloration has been determined, it is bracketed with the aid of facet-with the aid of-side evaluation underneath the same lighting conditions with or more colour references of regarded vicinity in
colour area. Diamonds are normally in comparison to one reference diamond at a time, and each are
positioned inside the identical orientation in the viewing tray. In the GIA grading system, the objective of the
comparison method is to location the diamond being graded in a selection among various references, now not
to suit it to a particular reference. In this manner, every of the diamond’s shade attributes (i.E., hue,
tone, and saturation) is bracketed.
Terminology
GIA’s coloured diamond shade grading terminology uses a mixture of fancy grades and colour
descriptions to find a diamond’s feature coloration in a region of coloration area. A fancy grade (e.G.,
Fancy Light, Fancy Intense) represents the blended effect of tone and saturation at the shade of a
diamond. These grades correspond to regions of tone and saturation in shade space; they’re additionally hue
dependent, seeing that exceptional shades reach their maximum saturation at different tiers.
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS three
4 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
The subtle coloration appearances of diamonds in the GIA color grades of Faint and Very Light aren’t reproduced within the following charts. In
each example, diamonds in these grades would occur in the top left nook of the charts. Also, please word that this booklet carries
pix illustrating diffused differences in coloration. Because of the inherent problems of controlling shade in printing, as well as the instability
of inks over time, the coloration in an illustration may additionally fluctuate from the actual coloration of the diamond.
The shade descriptions accompanying a elaborate grade are decided by the hue, and by the tone and
saturation of the hue. Some of the 27 hue names encompass modifiers which includes purplish or yellowish. A
modifier in a hue call does no longer denote a lack of capability electricity, or purity, to the colour.
Light or darkish colorings at low ranges of saturation are tough to discern. Thus, fewer terms are
used in these areas (as obvious in the hue circles for lighter and darker tone). These terms can be
modified in considered one of approaches. The first is using the word pink as a substitute for pink in the
medium to light tones and slight to weakly saturated versions of reddish purple, red-crimson, red-red, purplish crimson, pink, orangy pink, and reddish orange. The different is the addition of brown/brownish or gray/grayish to the outline. As hues transition darker or weaker, they appear greater
brown or gray. Warm colors (inclusive of yellow, orange, or purple) seem browner as they darken or weaken;
cool colorings (which include blue or inexperienced) seem grayer.
In each instance, the fancy grades and coloration descriptions represent a variety of coloration sensations,
now not a “unmarried” colour sensation.
Acknowledgments
Photography for the charts throughout this ebook become provided by Elizabeth Schrader and C. D.
Mengason (GIA New York and Carlsbad, respectively). Akira Hyatt, Joshua Cohn, and Thomas H.
Gelb of the GIA Laboratory in New York and Scott S. Guhin of the GIA Laboratory in Carlsbad furnished helpful discussions and assistance inside the diamond alternatives and appearance relationships for
the diverse pics.
John M. King
Editor
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS five
This hue circle illustrates each of the 27 colorings GIA makes use of to explain coloured
diamonds. The examples are reproduced at robust saturation stages for
each hue. Colors attain their strongest saturation at special tones, and this
is illustrated inside the samples (e.G., the yellow sample is lighter than the
blue). The gray band on the model at left also illustrates the general locations of these samples as they transition around the hue circle.
Continuous Hue Circle
6 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
Colors do no longer reach high ranges of saturation at lighter tones; nor does
the eye determine as many colours at these locations in shade space.
Therefore, fewer coloration terms are used. The grey band at the instance
at right shows the relative locations of the samples at the chart. These
diamonds frequently correspond to GIA colour grades of Light and Fancy Light.
Lighter Tone Hue Circle
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS 7
Similar to mild-toned diamonds, dark diamonds do not attain excessive ranges
of saturation. This is likewise an area of shade area wherein the eye discerns
fewer hues. Accordingly, fewer colour phrases are used here. The gray band
at the instance of shade space marks the general places of the diamonds at the hue circle. These diamonds often correspond to the GIA
grade variety of Fancy Dark, and have a grey or brown modifier.
DGIA Colored Diamond Color Reference Charts
For colored diamonds, the element of shade a ways outweighs the other “C’s” (clarity, cut, and carat weight)
inside the willpower of cost. Therefore, it is crucial to understand the relationship of coloration appearances that affect colour grades and outlines. For the majority, color is an intuitive reaction instead
than a real know-how of the systematic ordering of color appearances. Both, but, are vital
while the romance of coloration additionally turns into the enterprise of coloration.
GIA has advanced this booklet of coloration reference charts to help the diamantaire, store, and consumer
understand the ways in which diamond color appearances transition and relate. Color is defined the use of
3 attributes: hue (the advent of crimson, blue, inexperienced, or anything in between), tone (the relative
lightness or darkness of a color), and saturation (the relative electricity or weak spot of a coloration). The coloration
look of a gem is the end result of a combination of those three attributes. By standardizing the
organization of these three attributes, a coloration’s look may be located in colour space. The manner in
which GIA organizes color is pondered in the tone/saturation charts on this booklet. Understanding this
employer will assist the reader grasp the relationship of GIA’s color grades and descriptions.
The review of GIA’s color grading terminology and method that follows become first provided in
the Winter 1994 Gems & Gemology article “Color Grading Colored Diamonds on the GIA Gem Trade
Laboratory.” G&G’s next articles on the grading and characterization of type IIb blue (Winter
1998), red (Summer 2002), and yellow (Summer 2005) diamonds discuss some of circumstances
encountered in shade grading which are crucial to gain consistent results. The reader is cited
these articles for greater data in this topic. All may be discovered in Gems & Gemology in Review:
Colored Diamonds (J. M. King, Editor, Gemological Institute of America, Carlsbad, CA, 2006), to
which this charts publication is a partner piece.
Following the evaluations of method and terminology are 3 hue circles. All 27 of GIA’s shades for coloured diamonds are represented on the primary hue circle. The diamonds proven are all of rather sturdy
saturation, where variations between colours are most comfortably prominent. The observer will word that
on this hue circle, extraordinary colorations reach their maximum saturation at distinctive tones (i.E., lighter inside the yellow hue and darker within the blue and violet colorings).
Unlike the first hue circle, the next two circles cognizance on specific tones. The second instance indicates
lighter tone and corresponds to grades of approximately Light to Fancy Light, at the same time as the third demonstrates darker tone and corresponds to Fancy Dark. The eye discerns fewer colorations at these extremes of
tone, wherein colorations do not attain excessive ranges of saturation. Therefore, the light and dark tone hue circles
show a smaller range of examples than the only at higher saturation.
The 3 hue circle charts are observed by means of a chain of tone/saturation charts. From our revel in
INTRODUCTION
2 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
grading hundreds of hundreds of coloured diamonds, we’ve got found out that they do not occur continually in the course of their coloration area. Therefore, we have selected to breed charts for colorings that the observer is much more likely to come upon and that occur in exceptionally huge ranges of appearances. The 8 consultant hues covered here are: yellow (hotter and cooler appearances), orange-yellow, yellow-orange,
orangy purple (orangy pink), pink (purple), purplish pink (purplish pink), blue, and yellow-green. By representing
a number of colorings around the hue circle, those charts illustrate the whole variety of appearance transitions in
warm and funky colorations.
Methodology
Colored diamonds are color graded within the face-up role best, in a grooved, matte-white, non-fluorescent plastic tray. The surrounding environment and ambient lighting are eliminated from the equation via using a viewing box that gets rid of distractions and shields external light. A preferred
geometry among the diamond, the light supply, and the observer is used for the visible evaluation.
The face-up colour is evaluated most constantly while the light source is positioned immediately above
the diamond and the observer perspectives the diamond approximately perpendicular to the table side. For
important shade evaluation, the observer should be mechanically tested for ordinary color imaginative and prescient.
When viewed face-up, a diamond’s appearance is based on a combination of its length, form, faceting
association, and color. GIA describes a single coloration as being “feature” of the diamond as a
complete. This function color is the general combination of appearances that is not apparent surface reflection, dispersion, windowing, or extinction.
Once the characteristic coloration has been determined, it is bracketed with the aid of facet-with the aid of-side evaluation underneath the same lighting conditions with or more colour references of regarded vicinity in
colour area. Diamonds are normally in comparison to one reference diamond at a time, and each are
positioned inside the identical orientation in the viewing tray. In the GIA grading system, the objective of the
comparison method is to location the diamond being graded in a selection among various references, now not
to suit it to a particular reference. In this manner, every of the diamond’s shade attributes (i.E., hue,
tone, and saturation) is bracketed.
Terminology
GIA’s coloured diamond shade grading terminology uses a mixture of fancy grades and colour
descriptions to find a diamond’s feature coloration in a region of coloration area. A fancy grade (e.G.,
Fancy Light, Fancy Intense) represents the blended effect of tone and saturation at the shade of a
diamond. These grades correspond to regions of tone and saturation in shade space; they’re additionally hue
dependent, seeing that exceptional shades reach their maximum saturation at different tiers.
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS three
4 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
The subtle coloration appearances of diamonds in the GIA color grades of Faint and Very Light aren’t reproduced within the following charts. In
each example, diamonds in these grades would occur in the top left nook of the charts. Also, please word that this booklet carries
pix illustrating diffused differences in coloration. Because of the inherent problems of controlling shade in printing, as well as the instability
of inks over time, the coloration in an illustration may additionally fluctuate from the actual coloration of the diamond.
The shade descriptions accompanying a elaborate grade are decided by the hue, and by the tone and
saturation of the hue. Some of the 27 hue names encompass modifiers which includes purplish or yellowish. A
modifier in a hue call does no longer denote a lack of capability electricity, or purity, to the colour.
Light or darkish colorings at low ranges of saturation are tough to discern. Thus, fewer terms are
used in these areas (as obvious in the hue circles for lighter and darker tone). These terms can be
modified in considered one of approaches. The first is using the word pink as a substitute for pink in the
medium to light tones and slight to weakly saturated versions of reddish purple, red-crimson, red-red, purplish crimson, pink, orangy pink, and reddish orange. The different is the addition of brown/brownish or gray/grayish to the outline. As hues transition darker or weaker, they appear greater
brown or gray. Warm colors (inclusive of yellow, orange, or purple) seem browner as they darken or weaken;
cool colorings (which include blue or inexperienced) seem grayer.
In each instance, the fancy grades and coloration descriptions represent a variety of coloration sensations,
now not a “unmarried” colour sensation.
Acknowledgments
Photography for the charts throughout this ebook become provided by Elizabeth Schrader and C. D.
Mengason (GIA New York and Carlsbad, respectively). Akira Hyatt, Joshua Cohn, and Thomas H.
Gelb of the GIA Laboratory in New York and Scott S. Guhin of the GIA Laboratory in Carlsbad furnished helpful discussions and assistance inside the diamond alternatives and appearance relationships for
the diverse pics.
John M. King
Editor
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS five
This hue circle illustrates each of the 27 colorings GIA makes use of to explain coloured
diamonds. The examples are reproduced at robust saturation stages for
each hue. Colors attain their strongest saturation at special tones, and this
is illustrated inside the samples (e.G., the yellow sample is lighter than the
blue). The gray band on the model at left also illustrates the general locations of these samples as they transition around the hue circle.
Continuous Hue Circle
6 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
Colors do no longer reach high ranges of saturation at lighter tones; nor does
the eye determine as many colours at these locations in shade space.
Therefore, fewer coloration terms are used. The grey band at the instance
at right shows the relative locations of the samples at the chart. These
diamonds frequently correspond to GIA colour grades of Light and Fancy Light.
Lighter Tone Hue Circle
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS 7
Similar to mild-toned diamonds, dark diamonds do not attain excessive ranges
of saturation. This is likewise an area of shade area wherein the eye discerns
fewer hues. Accordingly, fewer colour phrases are used here. The gray band
at the instance of shade space marks the general places of the diamonds at the hue circle. These diamonds often correspond to the GIA
grade variety of Fancy Dark, and have a grey or brown modifier.
DGIA Colored Diamond Color Reference Charts
For colored diamonds, the element of shade a ways outweighs the other “C’s” (clarity, cut, and carat weight)
inside the willpower of cost. Therefore, it is crucial to understand the relationship of coloration appearances that affect colour grades and outlines. For the majority, color is an intuitive reaction instead
than a real know-how of the systematic ordering of color appearances. Both, but, are vital
while the romance of coloration additionally turns into the enterprise of coloration.
GIA has advanced this booklet of coloration reference charts to help the diamantaire, store, and consumer
understand the ways in which diamond color appearances transition and relate. Color is defined the use of
3 attributes: hue (the advent of crimson, blue, inexperienced, or anything in between), tone (the relative
lightness or darkness of a color), and saturation (the relative electricity or weak spot of a coloration). The coloration
look of a gem is the end result of a combination of those three attributes. By standardizing the
organization of these three attributes, a coloration’s look may be located in colour space. The manner in
which GIA organizes color is pondered in the tone/saturation charts on this booklet. Understanding this
employer will assist the reader grasp the relationship of GIA’s color grades and descriptions.
The review of GIA’s color grading terminology and method that follows become first provided in
the Winter 1994 Gems & Gemology article “Color Grading Colored Diamonds on the GIA Gem Trade
Laboratory.” G&G’s next articles on the grading and characterization of type IIb blue (Winter
1998), red (Summer 2002), and yellow (Summer 2005) diamonds discuss some of circumstances
encountered in shade grading which are crucial to gain consistent results. The reader is cited
these articles for greater data in this topic. All may be discovered in Gems & Gemology in Review:
Colored Diamonds (J. M. King, Editor, Gemological Institute of America, Carlsbad, CA, 2006), to
which this charts publication is a partner piece.
Following the evaluations of method and terminology are 3 hue circles. All 27 of GIA’s shades for coloured diamonds are represented on the primary hue circle. The diamonds proven are all of rather sturdy
saturation, where variations between colours are most comfortably prominent. The observer will word that
on this hue circle, extraordinary colorations reach their maximum saturation at distinctive tones (i.E., lighter inside the yellow hue and darker within the blue and violet colorings).
Unlike the first hue circle, the next two circles cognizance on specific tones. The second instance indicates
lighter tone and corresponds to grades of approximately Light to Fancy Light, at the same time as the third demonstrates darker tone and corresponds to Fancy Dark. The eye discerns fewer colorations at these extremes of
tone, wherein colorations do not attain excessive ranges of saturation. Therefore, the light and dark tone hue circles
show a smaller range of examples than the only at higher saturation.
The 3 hue circle charts are observed by means of a chain of tone/saturation charts. From our revel in
INTRODUCTION
2 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
grading hundreds of hundreds of coloured diamonds, we’ve got found out that they do not occur continually in the course of their coloration area. Therefore, we have selected to breed charts for colorings that the observer is much more likely to come upon and that occur in exceptionally huge ranges of appearances. The 8 consultant hues covered here are: yellow (hotter and cooler appearances), orange-yellow, yellow-orange,
orangy purple (orangy pink), pink (purple), purplish pink (purplish pink), blue, and yellow-green. By representing
a number of colorings around the hue circle, those charts illustrate the whole variety of appearance transitions in
warm and funky colorations.
Methodology
Colored diamonds are color graded within the face-up role best, in a grooved, matte-white, non-fluorescent plastic tray. The surrounding environment and ambient lighting are eliminated from the equation via using a viewing box that gets rid of distractions and shields external light. A preferred
geometry among the diamond, the light supply, and the observer is used for the visible evaluation.
The face-up colour is evaluated most constantly while the light source is positioned immediately above
the diamond and the observer perspectives the diamond approximately perpendicular to the table side. For
important shade evaluation, the observer should be mechanically tested for ordinary color imaginative and prescient.
When viewed face-up, a diamond’s appearance is based on a combination of its length, form, faceting
association, and color. GIA describes a single coloration as being “feature” of the diamond as a
complete. This function color is the general combination of appearances that is not apparent surface reflection, dispersion, windowing, or extinction.
Once the characteristic coloration has been determined, it is bracketed with the aid of facet-with the aid of-side evaluation underneath the same lighting conditions with or more colour references of regarded vicinity in
colour area. Diamonds are normally in comparison to one reference diamond at a time, and each are
positioned inside the identical orientation in the viewing tray. In the GIA grading system, the objective of the
comparison method is to location the diamond being graded in a selection among various references, now not
to suit it to a particular reference. In this manner, every of the diamond’s shade attributes (i.E., hue,
tone, and saturation) is bracketed.
Terminology
GIA’s coloured diamond shade grading terminology uses a mixture of fancy grades and colour
descriptions to find a diamond’s feature coloration in a region of coloration area. A fancy grade (e.G.,
Fancy Light, Fancy Intense) represents the blended effect of tone and saturation at the shade of a
diamond. These grades correspond to regions of tone and saturation in shade space; they’re additionally hue
dependent, seeing that exceptional shades reach their maximum saturation at different tiers.
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS three
4 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
The subtle coloration appearances of diamonds in the GIA color grades of Faint and Very Light aren’t reproduced within the following charts. In
each example, diamonds in these grades would occur in the top left nook of the charts. Also, please word that this booklet carries
pix illustrating diffused differences in coloration. Because of the inherent problems of controlling shade in printing, as well as the instability
of inks over time, the coloration in an illustration may additionally fluctuate from the actual coloration of the diamond.
The shade descriptions accompanying a elaborate grade are decided by the hue, and by the tone and
saturation of the hue. Some of the 27 hue names encompass modifiers which includes purplish or yellowish. A
modifier in a hue call does no longer denote a lack of capability electricity, or purity, to the colour.
Light or darkish colorings at low ranges of saturation are tough to discern. Thus, fewer terms are
used in these areas (as obvious in the hue circles for lighter and darker tone). These terms can be
modified in considered one of approaches. The first is using the word pink as a substitute for pink in the
medium to light tones and slight to weakly saturated versions of reddish purple, red-crimson, red-red, purplish crimson, pink, orangy pink, and reddish orange. The different is the addition of brown/brownish or gray/grayish to the outline. As hues transition darker or weaker, they appear greater
brown or gray. Warm colors (inclusive of yellow, orange, or purple) seem browner as they darken or weaken;
cool colorings (which include blue or inexperienced) seem grayer.
In each instance, the fancy grades and coloration descriptions represent a variety of coloration sensations,
now not a “unmarried” colour sensation.
Acknowledgments
Photography for the charts throughout this ebook become provided by Elizabeth Schrader and C. D.
Mengason (GIA New York and Carlsbad, respectively). Akira Hyatt, Joshua Cohn, and Thomas H.
Gelb of the GIA Laboratory in New York and Scott S. Guhin of the GIA Laboratory in Carlsbad furnished helpful discussions and assistance inside the diamond alternatives and appearance relationships for
the diverse pics.
John M. King
Editor
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS five
This hue circle illustrates each of the 27 colorings GIA makes use of to explain coloured
diamonds. The examples are reproduced at robust saturation stages for
each hue. Colors attain their strongest saturation at special tones, and this
is illustrated inside the samples (e.G., the yellow sample is lighter than the
blue). The gray band on the model at left also illustrates the general locations of these samples as they transition around the hue circle.
Continuous Hue Circle
6 GIA COLORED DIAMONDS COLOR REFERENCE CHARTS
Colors do no longer reach high ranges of saturation at lighter tones; nor does
the eye determine as many colours at these locations in shade space.
Therefore, fewer coloration terms are used. The grey band at the instance
at right shows the relative locations of the samples at the chart. These
diamonds frequently correspond to GIA colour grades of Light and Fancy Light.
Lighter Tone Hue Circle
GIA COLORED DIAMONDS COLOR REFERENCE CHARTS 7
Similar to mild-toned diamonds, dark diamonds do not attain excessive ranges
of saturation. This is likewise an area of shade area wherein the eye discerns
fewer hues. Accordingly, fewer colour phrases are used here. The gray band
at the instance of shade space marks the general places of the diamonds at the hue circle. These diamonds often correspond to the GIA
grade variety of Fancy Dark, and have a grey or brown modifier.
D

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