|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
MINERAL GEM WORLD
This is a natural untreated specimen on its natural matrix from Kazakhstan
Weight 98.40 cts app
Size 37 x 29 x 22 mm app
Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral. It is transparent to translucent. Its luster is vitreous to sub-adamantine.
Late in the 18th century, copper miners at the Altyn-Tyube (Altyn-Tube) mine, Karagandy Province,Kazakhstan thought they found an emerald deposit of their dreams. They found fantastic cavities in quartz veins in a limestone, filled with thousands of lustrous emerald-green transparent crystals. The crystals were dispatched to Moscow, Russia for analysis as they thought they were Emeralds.
Dioptase is a very rare mineral found mostly in desert regions where it forms as a secondary mineral in the oxidized zone of copper sulfide mineral deposits. However, the process of its formation is not simple, the oxidation of copper sulfides should be insufficient to crystallize dioptase as silica is normally minutely soluble in water except at highly alkaline pH. The oxidation of sulfides will generate highly acidic fluids rich in sulfuric acid that should suppress silica solubility. However, in dry climates and with enough time, especially in areas of a mineral deposit where acids are buffered by carbonate, minute quantities of silica may react with dissolved copper forming dioptase and chrysocolla
Nice polish, brighter in the picture but still beautiful, rough on the bottom, very pretty, fast shipping and speedy service, thank you.125 CTS LARGE LABRADORITE POLISHED SLAB [MGW 2323 ]
Wow, SO beautiful, as per usual the shipping and customer service were excellent and I can't wait to make a creation with this gorgeous piece.29.15 CTS OPAL FLUORITE 'TIFFANY STONE' [MGW707]
|Starts||16th Jan 2018 5:00pm PST|
|Ends||19th Jan 2018 5:00pm PST|
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