Dioptase

Dioptase from the Mindouli District is known for its vivid emerald-green crystals. The area is part of the Republic of the Congo’s historic copper-mining region, where small deposits have produced dioptase alongside blue plancheite, quartz, wulfenite, and mimetite.

Mining in Mindouli has taken place across numerous small prospects rather than one large deposit, making the exact locality an important detail for collectors.