Posted by: macadmin on 05.14.2020 | Filed under:


Specimen # 102549
Mineral: Bournonite
Location: Viboras Mine, Machacamarca District, Potosí, Bolivia
Size: 4.2 x 2.8 x 2.4 cm


Detailed Description

This piece features two groups of brilliant bournonite crystals. The bournonite crystals are classic “cogwheel” twins, and in each group they are intergrown. A beautiful arrangement of bournonite crystals of the highest quality. In excellent condition, one tiny nick on one lower edge of a small crystal in the left hand group, near the bottom. This is a killer!

About These Bolivian Bournonites

These bournonite crystals are from the Viboras Mine, Machacamarca District, Potosí, Bolivia. The locality has produced excellent bournonite specimens over the years, but the finds are have been sporadic, often years apart. The nature of the bournonite has varied from one find to the next, and some of the bournonite has been of modest lustre, sometimes dull, and of varying sharpness/definition. This latest find has produced sharp, lustrous bournonite crystals of the finest quality, exhibiting the classic “cogwheel” twinning.