1.9" Gemmy Dioptase Crystals on Quartz and Plancheite - Kimbedi, Congo

This is a phenomenal cluster of gemmy dioptase crystals on a quartz encrusted matrix, collected from the Kimbedi area of the Republic of the Congo. The entire specimen is 1.9" long and the crystals are a lustrous, deep emerald-green color. The light blue coloration is a result of plancheite formations.

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 cm in length.
It is popular with mineral collectors due to its vibrant color and it is occasionally cut into small emerald-like gems.

Dioptase, Quartz & Plancheite
Kimbedi area, Mindouli District, Pool Department, Republic of the Congo
1.9 x 1.5"