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Deep Blue Color-Change Fluorite Gem - 11.3ct Round Facet (ID: 445136)

Round Blue Color-Change Fluorite

11.3ct
14 mm
$ 282.40
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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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2 pcs
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Very Light Golden-Yellow Color-Change Diaspore Gem - 1.1ct Pear Facet (ID: 451573)

Pear Yellow Color-Change Diaspore

1.11 ct (total 2.22ctw)
13.1 x 4.6 mm
$ 104.34
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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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Brownish Yellow Color-Change Diaspore Gem - 6.7ct Cushion-Cut (ID: 381560)

Cushion Yellow Color-Change Diaspore

6.7ct
11.7 x 9.8 mm
$ 2,858.44
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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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Very Pale Yellow Color-Change Diaspore Gem - 3.3ct Pear Facet (ID: 390227)

Pear Yellow Color-Change Diaspore

3.3ct
13.1 x 7.6 mm
$ 825.00
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Bright Blue Color-Change Fluorite Gem - 14.2ct Round Facet (ID: 447652)

Round Blue Color-Change Fluorite

14.2ct
15.1 mm
$ 354.00
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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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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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Dark Blue Color-Change Fluorite Gem - 21.5ct Oval Facet (ID: 445591)

Oval Blue Color-Change Fluorite

21.5ct
20 x 15.1 mm
$ 538.22
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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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2 pcs
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Very Light Yellow Color-Change Diaspore Gem - 1.2ct Cushion-Cut (ID: 451649)

Cushion Yellow Color-Change Diaspore

1.22 ct (total 2.43ctw)
8 x 4.9 mm
$ 114.21
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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 Brown Color-Change Garnet Gem - 1.3ct Oval Facet (ID: 429480)

Oval Brown Color-Change Garnet

1.3ct
7.2 x 5.4 mm
$ 79.20
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Deep Blue Color-Change Fluorite Gem - 12.3ct Round Facet (ID: 413680)

Round Blue Color-Change Fluorite

12.3ct
14.1 mm
$ 306.25
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Light Brown Color-Change Garnet Gem - 1.5ct Oval Facet (ID: 344891)

Oval Brown Color-Change Garnet

1.5ct
8 x 6.1 mm
$ 133.20
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1 pc
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Dark Blue Color-Change Fluorite Gem - 13.4ct Round Facet (ID: 414402)

Round Blue Color-Change Fluorite

13.4ct
15 mm
$ 267.40
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Dark Blue Color-Change Fluorite Gem - 20.9ct Oval Facet (ID: 445416)

Oval Blue Color-Change Fluorite

20.9ct
20.2 x 15.2 mm
$ 525.18
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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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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
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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Popular Gemstones
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All Gemstones (144)
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