mineral group

Quartz with Muscovite Mica

SiO2 with KAl2(AlSi3O10)(OH)2

AI-generated identification · may be incorrect

Hardness: 7 (Quartz) and 2-2.5 (Mica); Color: White, grayish, or colorless with silvery flashes; Luster: Vitreous to pearly; Crystal structure: Trigonal/Monoclinic; Cleavage: None in quartz, perfect basal in mica.

Hardness: 7 (Quartz) and 2-2
Color: White, grayish, or colorless with silvery flashes
Luster: Vitreous to pearly

Identified May 10, 2026More mineral group →

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Physical properties

Formation & geological history

Typically forms in felsic igneous rocks like granite or in metamorphic rocks like schist through cooling magma or high-pressure alteration of clay minerals.

Uses & applications

Industrial use in glassmaking and electronics (quartz) and as an insulator or shimmer agent in cosmetics (mica). Often kept as educational specimens.

Geological facts

Muscovite was once used as a glass alternative in windows in medieval Russia, leading to the name 'Muscovy glass'. Quartz is the second most abundant mineral in Earth's continental crust.

Field identification & locations

Identify by looking for glassy, hard white masses (quartz) containing thin, shiny, silvery flakes that can be peeled with a fingernail (mica). Common in mountainous/granitic regions.