Amethyst Open Geode 35pc Flat

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Amethyst Geodes from Sonora, Mexico feature small double terminated amethyst crystals and druzy inside a pale pink and white matrix. These are already open geodes with sizes rangin g from 4 cm - 10 cm (1.5" - 4") in diameter. Its chemical formula is SiO2 and owes its purple coloration to irradiation of ferrous iron: Fe3+. 35 geode/pieces in flat. Show more