Amethyst Crystal Flower from Ametista do Sul, Brazil Pocket stone They form in metamorphic rocks

They form in metamorphic rocks that have undergone high-pressure and low-temperature conditions

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Halloysite is usually white

Beautiful clear / white apophyllite crystal cluster in a stalactite formation with a fluorescent calcite core (pale orange-pink)

with sphalerite core

Amethyst Crystal Flower from Ametista do Sul, Brazil Pocket stone They form in metamorphic rocksThis lavender color radial amethyst crystal "flower" comes from the renowned amethyst mines of Ametista do Sul, in Rio Grande do Sul, Brazil. Amethyst crystal flowers from Ametista do Sul formed over hundreds of thousands (or even millions) of years. They formed when silica saturated groundwater filled the narrow fissures in the basaltic volcanic rocks of the Serra Geral Formation (Lower Cretaceous in age). These beautiful amethyst crystals slowly