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Very Light Yellow Color-Change Diaspore Gem - 1.2ct Cushion-Cut (ID: 398509)

Cushion Yellow Color-Change Diaspore

1.2ct
9.8 x 4.9 mm
$ 58.49
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Dark Blue Color-Change Fluorite Gem - 11.3ct Round Facet (ID: 445130)

Round Blue Color-Change Fluorite

11.3ct
14 mm
$ 282.65
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1 pc
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Yellow Green Color-Change Diaspore Gem - 1.8ct Baguette Facet (ID: 398473)

Baguette Yellow Color-Change Diaspore

1.8ct
11 x 4.6 mm
$ 84.64
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Greenish Golden Brown Color-Change Garnet Gem - 1.3ct Oval Facet (ID: 429484)

Oval Brown Color-Change Garnet

1.3ct
6.9 x 5.2 mm
$ 80.40
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Golden Brown Color-Change Garnet Gem - 3.8ct Oval Facet (ID: 344565)

Oval Brown Color-Change Garnet

3.8ct
10.6 x 7.6 mm
$ 490.10
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4 pcs
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Very Light Yellow Color-Change Diaspore Gem - 0.5ct Round Facet (ID: 454509)

Round Yellow Color-Change Diaspore

0.48 ct (total 1.93ctw)
4.9 mm
$ 61.76
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Bright Blue Color-Change Fluorite Gem - 11.5ct Round Facet (ID: 413715)

Round Blue Color-Change Fluorite

11.5ct
14 mm
$ 286.25
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Light Brown Color-Change Garnet Gem - 1.4ct Pear Facet (ID: 344893)

Pear Brown Color-Change Garnet

1.4ct
9 x 5.9 mm
$ 126.90
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Yellow Green Color-Change Diaspore Gem - 1.1ct Cushion-Cut (ID: 396605)

Cushion Yellow Color-Change Diaspore

1.1ct
7.4 x 5.1 mm
$ 52.06
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2 pcs
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Very Light Yellow Color-Change Diaspore Gem - 1.5ct Cushion-Cut (ID: 451605)

Cushion Yellow Color-Change Diaspore

1.51 ct (total 3.01ctw)
11 x 4.7 mm
$ 141.47
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Umber Brown Color-Change Garnet Gem - 1.8ct Pear Facet (ID: 451452)

Pear Brown Color-Change Garnet

1.8ct
8.3 x 6.2 mm
$ 161.10
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Brownish Yellow Color-Change Diaspore Gem - 1.6ct Baguette Facet (ID: 398466)

Baguette Yellow Color-Change Diaspore

1.6ct
9.4 x 4.8 mm
$ 76.56
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Navy Blue Color-Change Fluorite Gem - 11.2ct Round Facet (ID: 414404)

Round Blue Color-Change Fluorite

11.2ct
14.1 mm
$ 224.20
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Light Brown Color-Change Garnet Gem - 1.8ct Pear Facet (ID: 344767)

Pear Brown Color-Change Garnet

1.8ct
10.5 x 6 mm
$ 159.30
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Light Yellow Color-Change Diaspore Gem - 0.8ct Round Facet (ID: 511253)

Round Yellow Color-Change Diaspore

0.8ct
5.3 mm
$ 36.00
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Golden Yellow Color-Change Garnet Gem - 0.6ct Oval Facet (ID: 429002)

Oval Yellow Color-Change Garnet

0.6ct
5.1 x 4.1 mm
$ 28.50
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Medium Blue Color-Change Fluorite Gem - 11.3ct Round Facet (ID: 413710)

Round Blue Color-Change Fluorite

11.3ct
14 mm
$ 282.00
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Medium Brown Color-Change Garnet Gem - 0.7ct Octagon / Scissor Cut (ID: 238079)

Brown Color-Change Garnet

0.7ct
7.1 x 3.5 mm
$ 84.31
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Intense Navy Blue Color-Change Fluorite Gem - 10.9ct Round Facet (ID: 413678)

Round Blue Color-Change Fluorite

10.9ct
14 mm
$ 273.25
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2 pcs
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Very Light Yellow Color-Change Diaspore Gem - 1.3ct Cushion-Cut (ID: 451570)

Cushion Yellow Color-Change Diaspore

1.31 ct (total 2.62ctw)
10.2 x 4 mm
$ 123.14
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Light Yellow Green Color-Change Diaspore Gem - 6.7ct Octagon / Scissor Cut (ID: 391064)

Yellow Color-Change Diaspore

6.7ct
22.7 x 7.5 mm
$ 2,482.70
Item in Stock
Color-Change Gems
There are various color change gems, which include color change garnet, color change diaspore, color change fluorite, color change sapphire and alexandrite.

Color-change garnet is a mix of spessartite and pyrope garnet. This garnet presents a color change from brownish in daylight to a rose pink in incandescent light. The color change is quite intense and dramatic, surpassing that of the more expensive alexandrite.

Alexandrite is one of the rarest of all colored gemstones and is famed for its color change from green in daylight to red under incandescent light. Fine faceted alexandrite over 1 carat is more valuable than sapphire, ruby or emerald. Alexandrite is a variety of chrysoberyl, with an excellent hardness of 8.5 on the Mohs scale, placing it right behind sapphire and ruby. Alexandrite is rare because of its chemical composition. Chrysoberyl is colored by traces of iron and titanium, but alexandrite is also colored by chromium, which gives it the emerald green hue in daylight.

Diaspore, sometimes marketed under the name Zultanite, is a color change gem from Turkey recently introduced to the international market. Diaspore is a hydrated aluminum oxide colored by manganese. It was first faceted as a gemstone in the 1980s, but was not commercially mined until recently. With reasonably good hardness (6.5 to 7 on the Mohs scale) and good brilliance, diaspore has been attracting considerable attention in the gem world. Under natural or fluorescent light, diapsore has a kiwi green color, with flashes of yellow. Diaspore displays a champagne color under incandescent lighting, and when exposed to subdued lighting, such as candlelight, it has a pinkish color. The larger the stone, the more pronounced the color change effect will be.

Color change fluorite is fluorite which exhibits a change of color under different lighting conditions; most often from blue under daylight, to purple under incandescent light. Fluorite is composed of calcium fluoride and is known for its many different colors. Some of the rarer fluorite colors prized by collectors are colorless and blue fluorite. Color change fluorite gems are typically faceted and available in a variety of shapes. As well as some fluorite stones possessing the optical phenomenon of color change, fluorite glows when heated and fluoresces under ultraviolet light. With a hardness rating of 4 on the Mohs scale, fluorite is a soft stone that should only be used for pendants, brooches or earrings. Fluorite is a very affordable and attractive gem. The origin of the word fluorite comes from the Latin verb to flow. Ancient Romans believed that drinking alcoholic beverages from vessels carved of fluorite prevented drunkenness.

Some rare sapphires exhibit a color change under varying lighting conditions. Color change sapphires are typically blue in natural light and purple under incandescent indoor light. Color changes may also be pink in daylight to greenish under fluorescent light. Some stones shift color well and others only partially, in that some stones go from blue to bluish purple.

To find the color change gemstones you seek, filter the results further by using the left-hand menu. You can buy color change gems by gem type, color and shape. By using the top menu, you can search by carat weight, size, price and other factors, to enable you to find the exact color change gems that you are looking for. All items are in stock and ready to be shipped.
Certified Customer Reviews
Overall Rating -> 8 star ratings
Nice stones, but mostly uncalibrated
Posted By Ron t in September, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Love the gem.... ease of finding the right gem. For me it was the size of the gem that was important on this purchase. I found the right size.
Posted By Makola in September, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I was really looking for a gem quality jadeite, exactly 7mm round. No such luck anywhere, so I bought several other 7mm stones just to look. Was fun rummaging through all the goodies.
Posted By PatPat in September, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great selection. I have ordered many times over the years and had good services and great stones.
Posted By Kel in September, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Great selection of items easey to place order definitely will order from you again Just wish that there was a place on the sight to convert MM to inches or be able to pick between mm and inches to determine the size of stone's for those of us that do not use the metric system
Posted By Nickel in September, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Bro, I found this dope ass site with thee most beautiful gems and the picture quality is awesome. When I tell you that you can choose so simply then you better believe it!
Posted By Jeff in September, 2019
Source: Bizrate
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  • Asscher Cut
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  • Cushion Buff-Top
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  • Cushion Checkerboard
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  • Marquise Buff-Top
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  • Octagon / Scissor Cut
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Popular Gemstones
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All Gemstones (145)
A B C D E F G H I J K L M N O P Q R S T V Z
  • Actinolite Cat's Eye
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart