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M219 Dioptase

M219 Dioptase


Here’s a fascinating new item, a very beautiful and rare specimen of Dioptase from Democratic Republic of Congo. It has beautiful smaller dedicate crystals exploding in all directions that gives it an exquisite appearance.  It measures 2″ x 2″ x 3/4″.   It is absolutely amazing.

In stock


Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral. It is transparent to translucent. Dioptase is an uncommon 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.

Additional information

Weight.25 lbs
Dimensions2 × 2 × 0.75 in

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