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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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Demantoid Single
From our finest gemstones collection
Demantoid Single Oval Slightly to Moderately included
Size: 7.50 X 6.30 MM
Weight: 2.060 CTS
Shape: Oval
Clarity: Slightly to Moderately included
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Danburite Single
limited time offer, ref# XDN482ag
Danburite Single Cushion Eye clean
Size: 11.30 X 7.30 MM
Weight: 2.500 CTS
Shape: Cushion
Clarity: Eye clean
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Demantoid Demantoid
5 Demantoid ’s available
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Phenakite Phenakite
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Quartz Quartz
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Grossularite Grossularite
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Gemstone Variety: Hits Index
Going Down Tanzanite -831596 -6.3%
average price USD 461.91 per item
Going Down Sapphire -28705 -8.7%
average price USD 399.77 per item
Going Up Amber +2795 +1.0%
average price USD 197.21 per item
Going Down Alexandrite -3602 -2.6%
average price USD 2483.44 per item
Going Up Spinel +369 +0.4%
average price USD 451.30 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Aquamarine
More from the Gem Library about Birthstones.
Aries Aries
March 21 – April 19
Cardinal sign. Born to be a Leader. Your zodiac stone...more

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