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Celadonite, K(Mg,Fe++)(Fe+++,Al)[Si4O10](OH)2, Nulvi, Anglona, Sassari Province, Sardinia, Italy. Fov 4 mm. Collection/Photo Giorgio Bortolozzi

Muscovite (var. Alurgite), Minas Gerais, Brazil. Size or image section: 15 x 12 mm. Copyright: rtbstone

Muscovite (var. Alurgite), Collection/Copyright: pilzpirat

Muscovite-Ba (=Oellacherite), (K,Ba)(Al,Mg)2(AlSi3O10)(OH)2, Crevola d'Ossola, Piedmont, Italy. Fov about 4 mm; green tabular Oellacherite crystals. Collection/Copyright: Klaus Schäfer

Muscovite, KAl2(Si3Al)O10(OH,F)2, (Star muscovite) with crystal, Jenipapo Mine, Jenipapo District, Itinga, Minas Gerais, Southeast Region, Brazil. Size 9 x 6 cm. Collection/Copyright: Mineralroli

Muscovite (var. Astrolite), KAl2(Si3Al)O10(OH,F)2, Neumark, Vogtland, Saxony, Germany. Muscovite in spherical aggregates, made of tabular crystals in radial shape. Copyright: geomueller

Muscovite (variety Astrolite), Neumark, Vogtland, Saxony, Germany. Brownish radial aggregated 'sun' of muscovite variety Astrolite Type and only locality. Copyright: McSchuerf

Muscovite, KAl2(Si3Al)O10(OH,F)2, Schwarzenbach am Bach, Binn Valley, Valais, Switzerland. Fov about 3 mm. Surfaces lightly coated of yellow mineral (limonite?). Collection/Copyright: Klaus Schäfer

Muscovite, KAl2(Si3Al)O10(OH,F)2, Clara Mine, Black Forest, Germany. Fov 2 mm. Copyright: Stephan Wolfsried

Li-Muscovite, Harding Mine, Picuris District, Taos Co., New Mexico, USA. Size 40x38 mm. Collection: George Vaux Collection, Bryn Mawr College. Copyright: Rock Currier