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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (1257): Color-Change Gems - Color Change Garnet, Color Change Sapphire, Alexandrite, Color-Change Diaspore, Color-Change Fluorite Clear All
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0.8ct Square Step-Cut Green to Pink Color-Change Diaspore Gem (ID: 478612)
0.82 ct Color-Change Diaspore
5.2 x 4.9 mm
$ 26.27
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4 pcs
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0.5ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 454600)
0.48 ct (total 1.93ctw) Color-Change Diaspore
4.7 mm
$ 61.76
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19.9ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 381559)
19.90 ct Color-Change Diaspore
15.4 mm
$ 6,500.92
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0.5ct Oval Facet Greenish Brown To Red Pink Color-Change Garnet Gem (ID: 429268)
0.50 ct Color-Change Garnet
5.2 x 3.9 mm
$ 25.00
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1.2ct Octagon Facet Green to Pink Color-Change Diaspore Gem (ID: 439745)
1.19 ct Color-Change Diaspore
6.4 x 5.3 mm
$ 33.32
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0.4ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 454510)
0.44 ct (total 1.74ctw) Color-Change Diaspore
4.8 mm
$ 55.68
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10.8ct Oval Facet Green to Pink Color-Change Diaspore Gem (ID: 381562)
10.84 ct Color-Change Diaspore
14.7 x 12.4 mm
$ 3,727.57
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0.8ct Square Facet Green to Pink Color-Change Diaspore Gem (ID: 437413)
0.78 ct Color-Change Diaspore
5.2 x 5.2 mm
$ 12.91
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1.1ct Cushion-Cut Green to Pink Color-Change Diaspore Gem (ID: 396964)
1.14 ct Color-Change Diaspore
7.6 x 5.4 mm
$ 54.45
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8.6ct Oval Facet Violet to Blue Color-Change Fluorite Gem (ID: 445408)
8.64 ct Color-Change Fluorite
15 x 11.3 mm
$ 216.69
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3.1ct Pear Facet Golden Brown to Orange Color-Change Garnet Gem (ID: 344769)
3.05 ct Color-Change Garnet
10.8 x 7 mm
$ 274.50
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6.7ct Cushion-Cut Green to Pink Color-Change Diaspore Gem (ID: 381560)
6.65 ct Color-Change Diaspore
11.7 x 9.8 mm
$ 2,858.44
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0.5ct Octagon Facet Green to Pink Color-Change Diaspore Gem (ID: 424837)
0.46 ct Color-Change Diaspore
6.3 x 3.8 mm
$ 13.80
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0.5ct Oval Facet Greenish Brown To Red Pink Color-Change Garnet Gem (ID: 429335)
0.54 ct Color-Change Garnet
5.3 x 3.9 mm
$ 27.00
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0.7ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 478425)
0.65 ct Color-Change Diaspore
5.2 mm
$ 20.83
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0.5ct Princess-Cut Green to Pink Color-Change Diaspore Gem (ID: 390156)
0.45 ct Color-Change Diaspore
4.6 x 4.6 mm
$ 14.72
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11.1ct Round Facet Violet to Blue Color-Change Fluorite Gem (ID: 414623)
11.08 ct Color-Change Fluorite
14.1 mm
$ 221.60
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1.3ct Cushion-Cut Green to Pink Color-Change Diaspore Gem (ID: 454009)
1.31 ct Color-Change Diaspore
9.4 x 4.8 mm
$ 41.92
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11.2ct Round Facet Violet to Blue Color-Change Fluorite Gem (ID: 414404)
11.21 ct Color-Change Fluorite
14.1 mm
$ 224.20
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0.4ct Round Facet Green to Pink Color-Change Diaspore Gem (ID: 475333)
0.35 ct (total 1.04ctw) Color-Change Diaspore
4.2 mm
$ 33.28
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4 pcs
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0.6ct Cushion-Cut Golden Brown to Orange Color-Change Garnet Gem (ID: 346362)
0.58 ct (total 2.32ctw) Color-Change Garnet
4.5 x 4.5 mm
$ 208.80
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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 -> 10 star ratings
Colors and qualities of gems are very well represented online. Easy to use website. Great selections!
Posted By in November, 2018
Source: Bizrate
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This was my second purchase from GemSelect and definitely won’t be my last! They have a very wide variety of gems and you can always find what you are looking for with ease and the prices are very good.
Posted By Jill in November, 2018
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Overall Rating -> 10 star ratings
Loved the wide selection of product
Posted By Miki in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
finally bought the last rock to complete my ring idea; needed another white one after giving the big diamond to my daughter. a diamond that size is out of my retired-school-teacher budget, so i bought a white zircon. went back to the same place that i got my loose sapphire-- great selection, good prices, good delivery!
Posted By Ptcmom in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I'm always real pleased with this website, I don't think there is much you could do to make it any better. I wish the shipping charges were lower, but it is understandable.
Posted By Spinch13 in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This is a site that sources valuable and genuine stones forms around the world, with and honest and descriptive sections, as well as specs, and the option to have the gemstone collection one might purchased—certified! Price ranges vary, but are always affordable and always worth it, whether it’s a gift, or for a personal business.
Posted By Bradley in November, 2018
Source: Bizrate
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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