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Quartz amethyst

Quartz amethyst
Photographer: Monica Graeme
ID: ASDM03792
Copyright: © 1992 Monica Graeme
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Date: August 1992
Location Mined: Prescott, Yavapai County, Arizona, U.S.A.
Caption: Quartz amethyst
Scientific Name: Quartz amethyst
Synonyms: Amethyst, Amatista, Amethystine Agate, Amethystine quartz, Ametista, Lavendine, Spirit Quartz
Strunz Class: Class IV - Oxides, hydroxides
Crystal Growth Form: Rhombohedral
Formula: SiO2

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This species is present in the Arizona-Sonora Desert Museum's permanent collection.