Pentagonite on Chalcedony Rare Find Natural Mineral Specimen # B 5762

Features:

Primary Mineral: Pentagonite
Secondary Mineral: Chalcedony
Size: 4 x 3 inches (10.2 x 7.6 cm)
Size Class: Cabinet
Weight: 510 g (18 oz)
Locality: Pune, Maharashtra, India

A bright, glossy blue pentagonite spray radiating in a star-like burst across a gray-white chalcedony matrix with rust-colored flecks, from Pune. The crystals are sharp and in good condition, and the vivid blue is the clear focus of the piece.

Pentagonite is the rarer dimorph of cavansite: the same calcium vanadium silicate chemistry in a different crystal structure. It typically forms twinned crystals with a five-sided, star-like outline, and nearly all fine examples come from the Pune district. Sharp crystals like this one are rarely found.

A cabinet-sized pentagonite specimen for species collectors.