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Letterpress folio · Dual buy-left

20139 - Beautiful Purple Natural Amethyst Crystals Cluster Minas Gerais District - Brazil Cobaltoan calcite This species was described by

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Press gallery Minimal four

Folio notes

Description

This species was described by Lavocat (1954)

Nopcsa 1928

The matrix has some fractures that have been glued together

Iberocoryphe

20139 - Beautiful Purple Natural Amethyst Crystals Cluster Minas Gerais District - Brazil Cobaltoan calcite This species was described byAmethyst is a purple variety of quartz (SiO2) and owes its violet color to irradiation, impurities of iron and in some cases other transition metals, and the presence of other trace elements, which result in complex crystal lattice substitutions. The hardness of the mineral is the same as quartz, thus making it suitable for use in jewelry.

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