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Bournonite - Cogswheel type crystals
Colavi Mine, Machacamarca district, Cornello Saavedra Province
Potosi, Bolivia
3.1 x 2.6 x 2.4 CM (small miniature/ large thumbnail (toenail))
price: $390


A fine complete cogswheel cluster of Bournonite crystals that is perfect on all sides, undamaged and with classic gunmetal luster. Bournonite is a delicate mineral and perfect clusters of this sort are quite rare. A tiny bit of adhering matrix gives some nice contrast. This is a very fine and unusually sharp specimen from Bolivia that really looks just like a vintage Herodsfoot specimen. From recent mining this is obviously far less expensive than the English classics!




Bournonite - Cogswheel type crystals
Colavi Mine, Machacamarca district, Cornello Saavedra Province
Potosi, Bolivia
3.1 x 2.6 x 2.4 CM (small miniature/ large thumbnail (toenail))
price: $390


A fine complete cogswheel cluster of Bournonite crystals that is perfect on all sides, undamaged and with classic gunmetal luster. Bournonite is a delicate mineral and perfect clusters of this sort are quite rare. A tiny bit of adhering matrix gives some nice contrast. This is a very fine and unusually sharp specimen from Bolivia that really looks just like a vintage Herodsfoot specimen. From recent mining this is obviously far less expensive than the English classics!