|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Brazil > Calcite and Amethyst
|Calcite and Amethyst
|Irai, Rio Grande do Sul, Brazil
|Sculptural formation of purple-gray amethyst quartz crystals up to 25 mm with colorless calcite crystals up to 9 mm. The calcite fluoresces red-orange under UV illumination. All are grown on matrix of green nontronite.
|For reference only
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