Muscovite

Formula: KAl₂(Si₃Al)O₁₀(OH,F)₂
Mineral class: silicates
Crystal system: monoclinic
Mohs scale: 2.5
Density (g/cm³): 2.77 - 2.88
Refractive index: 1.552 - 1.618
Cleavage: perfect
Colors: colorless, grey, yellow, orange, rose, red, brown, green, bluish, blackish
Transparency: transparent - translucent
Luster: vitreous - pearly - silky
Fluorescence: -
Pleochroism: weak
Largest crystal: 4.5 m?
Deposits: worldwide
Discovery: ?
1st Description: ?
Name: based on the old Russian expression "Muscovy glass" for the former use of muscovite as replacement of windowpanes

Muscovite Mineral

Size: 5.9 x 5.1 x 3.6 cm

Origin: Minas Gerais / Brazil

Photo by kind permission of © www.irocks.com

Muscovite Mineral

Size: 9.4 x 8.3 x 6.0 cm

Origin: Proberil Mine / Galiléia / Minas Gerais / Brazil

Photo by kind permission of © www.fabreminerals.com

Muscovite Mineral

Size: 7.0 x 5.0 x 4.0 cm

Origin: Araçuat / Minas Gerais / Brazil

Photo by kind permission of © António Manuel Ináçio Martins

Muscovite Mineral

Crystal size: 0.3 cm

Origin: Palermo No.1 Mine / Groton / Grafton County / New Hampshire / USA

Photo by kind permission of © Peter Cristofono

Muscovite Mineral

Image width: 1 cm

Origin: Chesterfield / Hampshire County / Massachusetts / USA

Photo by kind permission of © Peter Cristofono

Muscovite

Weight: 1.94 ct

Origin: Brazil

Photo by kind permission of © www.minclassics.com

Muscovite Mineral

Size: 9.1 x 5.9 x 4.1 cm

Origin: Harding Mine / Picuris Distr. / Taos County / New Mexico / USA

Photo by kind permission of © www.irocks.com

Muscovite Mineral

Size: 5.5 x 5.1 x 1.2 cm

Origin: Minas Gerais / Brazil

Photo by kind permission of © www.irocks.com

Muscovite Mineral

Crystal size: 0.8 cm

Origin: Tamminen Quarry / Greenwood / Oxford County / Maine / USA

Photo by kind permission of © Peter Cristofono

Muscovite Mineral

Image width: 0.3 cm

Origin: Furka Basis Tunnel / Goms / Wallis / Switzerland

Photo by kind permission of © Stephan Wolfsried

Muscovite Mineral

Image width: 0.8 cm

Origin: La Haie Forest / Bertrix / Luxembourg Prov. / Belgium

Photo by kind permission of © Harjo Neutkens

Muscovite Mineral

Image width: 7 cm

Origin: Keyes Mica Mines / Orange / Grafton County / New Hampshire / USA

Photo by kind permission of © Peter Cristofono