1.65" Gemmy Dioptase Crystal Cluster - Sanda, Congo

Gemmy Dioptase Crystal Cluster - Sanda, Congo #303845

This is a beautiful cluster of gemmy dioptase crystals, collected from the Sanda Mine (Sanda Hills occurrences) in the Republic of the Congo (Brazzaville). The entire specimen is 1.65" wide and the dioptase is a lustrous, emerald-green color with wonderful translucency.

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. This copper-based mineral forms small rhombohedral crystals, typically less than 0.75 centimeters in length. It is popular with mineral collectors due to its vibrant color and it is occasionally cut into small emerald-like gems.

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