Renéville Mine, Renéville, Kindanba District, Pool Department, Republic of Congo
Here a large and intergrown mass of Dioptase crystals, up to 0.62 inches (1.6 cm) in length, are partially embedded in colorless Calcite of subhedral form. The demand for good Dioptase has outstripped the supply, driving prices for decent specimens ever upward. Luster of this blue-green Dioptase is glassy, and the overall condition of the cabinet-size specimen is excellent to pristine, with but minor nicking to peripheral areas.
Overall measurements: 5.2 x 4.2 x 2.4 inches (13.3 x 10.7 x 6.2 cm)
Estimate: $5,800 - $7,800.
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