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Aluminoceladonite: KAl(Mg,Fe++)[ ]Si4O10(OH)2 Muscovite: KAl2(Si3Al)O10(OH,F)2
Comments: Large, 1cm, purple crystals of muscovite/leucophyllite, (var. alurgite which is an intermediate composition to muscovite and leucophyllite (aluminoceladonite).
Location: Ultevis, Sweden.
© Tom Loomis / Dakota Matrix