Dioptase - Specimen fire opal oregon often in calcium-rich rocks that

often in calcium-rich rocks that have been altered by hot fluids

5cmApproximate Weight of 1 piece: 165g

sphalerite

upright cluster of elongated white to colorless crystals with a distinctly bladed

Dioptase - Specimen fire opal oregon often in calcium-rich rocks thatMined from: Renville, Pool Malebo area, Kongo Central, Democratic Republic of the Congo Description: This one of a kind dioptase specimen has a more open crystal habit than the previous pieces, with individual crystals standing out clearly from the dark matrix. The color is a vivid blue green with strong transparency in several points, and the larger crystals rise prominently above a dense bed of smaller growth. The contrast here is especially strong: