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Natural Dioptase

Among collectors and mineralogists, dioptase is known and prized for its’ intense emerald blueish-green colors and the well formed crystals in which it can occur. It crystallizes in the hexagonal system forming coarse sized prismatic crystals, crystalline or cryptocrystalline aggregates or in massive forms. With a hardness of 5 and perfect cleavage dioptase is too soft for effective use as a gemstone and is rarely faceted. It usually occurs in the oxidation zone of copper deposits.


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Dioptase Profile

Color information: Dark blue green, emerald green, or turquoise
Refractive Index: RI 1.644 – 1.709
Chemical Composition: CuSiO2(OH) 2
Hardness: 5
Density: 3.28 – 3.55
Crystal Group: Hexagonal
Ocurrence: Russia, Tsumeb Namibia, California and Colorado USA, Congo, Zaire, Chile
Sign of the Zodiac: N/A
Month of the year: N/A
Dioptase

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Chrome Tourmaline Single
From our finest gemstones collection
Chrome Tourmaline Single Round Slightly included
Size: 20.40 X 20.40 MM
Weight: 20.060 CTS
Shape: Round
Clarity: Slightly included
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Danburite Single
limited time offer, ref# XDN237ei
Danburite Single Octagon Eye clean
Size: 12.50 X 9.50 MM
Weight: 5.730 CTS
Shape: Octagon
Clarity: Eye clean
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1645 Sapphire ’s available
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Gemstone Variety: Hits Index
Going Down Amber -79783 -1.7%
average price USD 183.13 per item
Going Down Sapphire -6739 -0.3%
average price USD 393.58 per item
Going Down Alexandrite -1673 -0.2%
average price USD 2091.34 per item
Going Up Parisite +82062 +13.5%
average price USD 122.67 per item
Going Down Turquoise -248 +-0.0%
average price USD 57.70 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Citrine, Topaz
More from the Gem Library about Birthstones.
Scorpio Scorpio
October 23 – November 21
Fixed Sign. Scorpio is imaginative and emotional. Your zodiac stone...more

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