Superb gem borcarite crystals from a new find in San Bartolo Mine, Charcas, Mexico. Borcarite is a rare calcium magnesium borate and these are among the finest borcarite crystals in the world. It displays sharp tabular crystals to 4mm. They are gem with very pleasing sea blue color. They are lustrous. In excellent condition. On acrylic base.

Fantastic rarity!