This is one of the rare borates determined in Kohnstein quarry. The crystals, sharp and well defined, are completely transparent, colorless, large for the species and on matrix. It comes from this currently inactive quarry in the Harz mountains. 273e3k

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Very rich specimen formed by several hydroboracite crystals, with a very elongated prism and well-defined faces and edges. Totally colorless, transparent and with an extraordinary brightness. A piece of the best quality for the species. It belongs from a currently inactive quarry in the Harz mountains.

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