Staurolite

Estaurolita, Stauroliet, Stauroliitti, Staurolit, Staurolitas, Staurolith, Staurotide, Ставролит, 十字石, סטאורוליט


Commonly known      rarer (so called collectors stones)      very rare (rarities)      relatively rare organic material


Formula: (Fe2+,Mg,Zn)2Al9(Si,Al)4O22(OH)2
Mineral class: sulfides
Crystal system: monoclinic
Mohs scale: 7 - 7.5
Density (g/cm3): 3.65 - 3.77
Refractive index: 1.736 - 1.762
Cleavage: restricted
Colors: brownish
Luster: subvitreous - resinous
Fluorescence: -
Pleochroism:
X: colorless, Y: light yellow, Z: golden yellow
Largest Staurolite: 12 cm?
Deposits: worldwide
Discovery: ?
1st Description: 1892
Name: a combination of the Greek words "stauros" (cross), and "lithos" (stone)

Staurolite Mineral

Origin: Keivy / Kola Peninsula / Russia

Photo by kind permission of © www.exceptionalminerals.com
Staurolite

Staurolite Mineral

Size: 1.7 x 0.9 x 0.4 cm

Origin: Borborema / Paraíba / Brazil

Photo by kind permission of © www.lucianabarbosa.com
Staurolite
Staurolite

Weight: 0.38 ct

Origin: Brazil

Photo by kind permission of © www.gemfrance.com
Staurolite

Weight: 12.50 ct

Origin: Brazil

Photo by kind permission of © www.ravenstein-germany.com


⇐ Intro Page ⇐ Gemstones