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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (1332): Color-Change Gems - Color Change Garnet, Color Change Sapphire, Alexandrite, Color-Change Diaspore, Color-Change Fluorite Clear All
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thumb image of 0.9ct Octagon Step Cut Green to Pink Color-Change Diaspore (ID: 478516)
0.86 ct Color-Change Diaspore
6.2 x 4.4 mm
$ 27.55
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4 pcs
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thumb image of 1.7ct Round Facet Green to Pink Color-Change Diaspore (ID: 454510)
1.74 ctw Color-Change Diaspore
4.8 mm
$ 55.68
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thumb image of 19.9ct Round Facet Green to Pink Color-Change Diaspore (ID: 381559)
19.90 ct Color-Change Diaspore
15.4 mm
$ 6,500.92
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thumb image of 0.8ct Marquise Facet Green to Pink Color-Change Diaspore (ID: 437177)
0.75 ct Color-Change Diaspore
9.4 x 4.1 mm
$ 12.41
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thumb image of 0.9ct Octagon Facet Green to Pink Color-Change Diaspore (ID: 439866)
0.93 ct Color-Change Diaspore
5.9 x 5.6 mm
$ 26.04
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5 pcs
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thumb image of 1.6ct Round Facet Green to Pink Color-Change Diaspore (ID: 454602)
1.56 ctw Color-Change Diaspore
4.1 mm
$ 49.92
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thumb image of 3.8ct Oval Facet Golden Brown to Orange Color-Change Garnet (ID: 344565)
3.77 ct Color-Change Garnet
10.6 x 7.6 mm
$ 490.10
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thumb image of 10.8ct Oval Facet Green to Pink Color-Change Diaspore (ID: 381562)
10.84 ct Color-Change Diaspore
14.7 x 12.4 mm
$ 3,727.57
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thumb image of 0.4ct Square Step-Cut Green to Pink Color-Change Diaspore (ID: 478616)
0.40 ct Color-Change Diaspore
4.3 x 4.2 mm
$ 12.82
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thumb image of 0.9ct Octagon Facet Green to Pink Color-Change Diaspore (ID: 440027)
0.85 ct Color-Change Diaspore
5.6 x 5.3 mm
$ 23.80
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4 pcs
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thumb image of 2.2ct Round Facet Green to Pink Color-Change Diaspore (ID: 390564)
2.20 ctw Color-Change Diaspore
5 mm
$ 52.45
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thumb image of 6.7ct Cushion-Cut Green to Pink Color-Change Diaspore (ID: 381560)
6.65 ct Color-Change Diaspore
11.7 x 9.8 mm
$ 2,858.44
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thumb image of 0.8ct Square Facet Green to Pink Color-Change Diaspore (ID: 437413)
0.78 ct Color-Change Diaspore
5.2 x 5.2 mm
$ 12.91
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thumb image of 1.4ct Cushion-Cut Green to Pink Color-Change Diaspore (ID: 454134)
1.38 ct Color-Change Diaspore
8 x 5.1 mm
$ 44.16
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thumb image of 2.6ct Oval Facet Greenish Brown to Orange Color-Change Garnet (ID: 419786)
2.64 ct Color-Change Garnet
5.8 x 9.4 mm
$ 237.60
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thumb image of 6.7ct Octagon / Scissor Cut Green to Pink Color-Change Diaspore (ID: 391064)
6.71 ct Color-Change Diaspore
22.7 x 7.5 mm
$ 2,482.70
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thumb image of 0.8ct Square Facet Green to Pink Color-Change Diaspore (ID: 437343)
0.79 ct Color-Change Diaspore
5.4 x 5.3 mm
$ 13.07
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thumb image of 21.5ct Oval Facet Violet to Blue Color-Change Fluorite (ID: 445591)
21.46 ct Color-Change Fluorite
20 x 15.1 mm
$ 538.22
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thumb image of 1.3ct Cushion-Cut Green to Pink Color-Change Diaspore (ID: 388710)
1.28 ct Color-Change Diaspore
8.1 x 4.7 mm
$ 62.26
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4 pcs
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thumb image of 2.3ct Cushion-Cut Golden Brown to Orange Color-Change Garnet (ID: 346362)
2.32 ctw Color-Change Garnet
4.5 x 4.5 mm
$ 208.80
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thumb image of 4.9ct Cushion-Cut Green to Pink Color-Change Diaspore (ID: 391063)
4.89 ct Color-Change Diaspore
13.4 x 9.1 mm
$ 1,467.00
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.
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Happy about the experience of the store, a lot of stone urge very nice
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when I need a colored stone I check gem select. a trusted supplier for at least 10 years for me. many of the online sites have gone black but gemselect continues to satisfy me. oh sure there are many windowed and poorly cut stones here so paying some attention is critical. remember these are not custom cut stones but rather cut by old methods and the aim is to keep weight up at the expense of optical perfection. remember that colored stones are about color as the first consideration. I just wish gemselect offered rough for those who want to cut it.
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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