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(1235)
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Pale Yellow Color-Change Diaspore Gem - 0.7ct Cushion-Cut (ID: 424653)

Cushion Yellow Color-Change Diaspore

0.7ct
5.2 x 5.1 mm
$ 21.00
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Golden Yellow Color-Change Garnet Gem - 0.7ct Trillion Facet (ID: 555786)

Trillion Yellow Color-Change Garnet

0.7ct
5.5 x 5.4 mm
$ 84.30
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Medium Light Brown Color-Change Garnet Gem - 0.5ct Pear Facet (ID: 346320)

Pear Brown Color-Change Garnet

0.5ct
5.6 x 3.7 mm
$ 41.40
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1 pc
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Very Light Yellow Color-Change Diaspore Gem - 0.6ct Square Facet (ID: 544826)

Square Yellow Color-Change Diaspore

0.6ct
4.7 x 4.6 mm
$ 21.36
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1 pc
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Very Light Yellow Color-Change Diaspore Gem - 0.7ct Pear Facet (ID: 454188)

Pear Yellow Color-Change Diaspore

0.7ct
8.9 x 4.5 mm
$ 23.68
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Brownish Yellow Color-Change Diaspore Gem - 1.3ct Cushion-Cut (ID: 422152)

Cushion Yellow Color-Change Diaspore

1.3ct
8.5 x 4.3 mm
$ 54.62
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Light Yellow Color-Change Diaspore Gem - 0.6ct Octagon Facet (ID: 555440)

Octagon / Emerald Cut Color-Change Diaspore

0.6ct
5.7 x 3.9 mm
$ 18.95
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1 pc
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Light Golden Yellow Color-Change Diaspore Gem - 1.1ct Octagon Facet (ID: 397450)

Octagon / Emerald Cut Color-Change Diaspore

1.1ct
6.5 x 4.9 mm
$ 52.94
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Very Light Yellow Color-Change Diaspore Gem - 0.7ct Princess-Cut (ID: 545077)

Square Yellow Color-Change Diaspore

0.7ct
5.1 x 5 mm
$ 22.37
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Light Yellow Color-Change Diaspore Gem - 1.2ct Octagon Facet (ID: 397183)

Octagon / Emerald Cut Color-Change Diaspore

1.2ct
8.5 x 4.3 mm
$ 59.22
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Very Light Yellow Color-Change Diaspore Gem - 1.1ct Cushion-Cut (ID: 396420)

Cushion Yellow Color-Change Diaspore

1.1ct
6.7 x 6 mm
$ 50.15
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Light Yellow Color-Change Diaspore Gem - 1ct Pear Facet (ID: 395655)

Pear Yellow Color-Change Diaspore

1ct
6.4 x 4.8 mm
$ 47.69
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Dark Blue Color-Change Fluorite Gem - 12.3ct Round Facet (ID: 445139)

Round Blue Color-Change Fluorite

12.3ct
14.9 mm
$ 307.73
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Click for Product Video (511708)
Light Yellow Color-Change Diaspore Gem - 1ct Octagon Step Cut (ID: 511708)

Octagon / Emerald Cut Color-Change Diaspore

1ct
6.6 x 4.5 mm
$ 46.35
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Very Light Yellow Color-Change Diaspore Gem - 0.6ct Round Facet (ID: 388250)

Round Yellow Color-Change Diaspore

0.6ct
5.2 mm
$ 18.05
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Dark Brown Color-Change Garnet Gem - 0.8ct Oval Facet (ID: 429110)

Oval Brown Color-Change Garnet

0.8ct
5.7 x 4.6 mm
$ 40.50
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Light Yellow Color-Change Diaspore Gem - 0.8ct Marquise Facet (ID: 511257)

Marquise Yellow Color-Change Diaspore

0.8ct
9.8 x 4.1 mm
$ 37.35
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Yellow Beige Color-Change Diaspore Gem - 0.9ct Cushion-Cut (ID: 454343)

Cushion Yellow Color-Change Diaspore

0.9ct
8.8 x 4.1 mm
$ 27.20
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Golden Brown Color-Change Garnet Gem - 0.6ct Oval Facet (ID: 545328)

Oval Brown Color-Change Garnet

0.6ct
6.1 x 4.1 mm
$ 24.40
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4 pcs
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Golden-Brown Color-Change Garnet Gem - 0.6ct Cushion-Cut (ID: 346362)

Cushion Golden Color-Change Garnet

0.58 ct (total 2.32ctw)
4.5 x 4.5 mm
$ 208.80
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Medium Yellow Color-Change Diaspore Gem - 1.2ct Baguette Facet (ID: 422548)

Baguette Yellow Color-Change Diaspore

1.2ct
9.2 x 4.1 mm
$ 51.60
Item in Stock

About 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
I purchased several green chrome tourmaline loose stones from GemSelect Twice over the last 2 years. Those stones made my wife' wedding ring, necklace and earings. Created by the goldsmith at Maus jewelers. . . Masterpieces of God's creation and mans creativity to the glory of God's love! they couldn't have done it without starting here first! FANTASTIC!!!
Posted By TourmalineDreams in August, 2020
Source: Bizrate
Overall Rating -> 9 star ratings
It really depends on the product for the end Highway arrives and the true colors the shape the size in all those things piano well I will definitely suggest to other people about gem select.
Posted By Sgt.Meds in August, 2020
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Overall Rating -> 10 star ratings
Easy to look at a lot of gems. Nice selection of sizes and prices. Fun to shop there.
Posted By Moose in August, 2020
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Overall Rating -> 10 star ratings
GemSelect has a great variety of gemstones at a great price. Fast delivery.
Posted By Rme gems in August, 2020
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Overall Rating -> 10 star ratings
Absolute Perfection ! Gemselects web site makes it is so easy to locate what ever you are looking for.
Posted By Tinbien in August, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
I just learned and purchased a “citrine” crystal is hat I found out was a baked amethyst but it can be sold as citrine but it’s not. So I was looking for genuine Brazilian citrine and it brought me to this site, had a ton of selections in various cuts which was impressive and that it comes certified. Which is amazing.
Posted By Fonzi in August, 2020
Source: Bizrate
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Article Categories

Total Number of Articles: 1315

More Shapes
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  • Cushion Concave Fantasy Cut
  • Cushion Crystal Cluster
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  • Cushion Shape Sugarloaf Cabochon
  • Cushion Sugarloaf Cabochon
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  • Fancy Bicone
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  • Octagon / Scissor Cut
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  • Oval Fancy Facet
  • Oval Fantasy Concave Cut
  • Oval Mixed Cut
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  • Pear Checkerboard
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  • Pear Concave Cut
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  • Pencil
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  • Trillion Shape Sugarloaf Cabochon
  • Undrilled Briolette Teardrop
Popular Gemstones
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All Gemstones (143)
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