Helvite with Microcline
specimen number:
1604293
location:
Navegadora Mine, Sao Geraldo de Baixo, Minas Gerais, Brazil
description:
A fine example for the species with very sharp crystals of helvite measuring to 0.5 cm in size across a crystallized white microcline matrix. Muscovite is present as well. The helvite crystals are brightly fluorescent red under longwave ultraviolet light.
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