muscovite mica from a pegmatite near Coronel Murta, Minas Gerais, Brazil - hand/display specimen Contributions to Mineralogy and Petrology

Contributions to Mineralogy and Petrology 164 (3): 477 - 492 [2012]

incomplete

but you can scratch it with a penny to confirm the identification

Answer this after you read the notes on the Navajo sandstone-derived sand

The angular nature of these grains shows that transport was short

muscovite mica from a pegmatite near Coronel Murta, Minas Gerais, Brazil - hand/display specimen Contributions to Mineralogy and Petrologymuscovite mica KAL3Si3O10(OH)2 Coronel Murta, Minas Gerais, Brazil Muscovite is a common rock forming mineral. In pegmatites, which are essentially giant crystal granitic rocks, muscovite forms large books and can be cleaved into large sheets. It is mined commercially for use as an insulator in transformers and electrical equipment. Scrap muscovite, small flakes, is used as a filler or extender in paints. Transparent in thin sheets, muscovite is