staurolite

listen to the pronunciation of staurolite
İngilizce - İngilizce
A dark brown nesosilicate mineral that has crystals that cross and intergrow
{n} a siliceous stone white or gray
Silicate mineral produced by regional metamorphism in rocks such as mica schists, slates, and gneisses, where it is generally associated with other minerals. Staurolite is a brittle, hard mineral that has a dull lustre. Its crystals are usually dark brown and are often twinned in cruciform patterns (known as fairy crosses) that can be made into ornaments. Staurolite occurs especially in Canada, Brazil, France, Switzerland, and the U.S. (North Carolina, Virginia, and Georgia)
It is a silicate of aluminia and iron, and is generally found imbedded in mica schist
A mineral of a brown to black color occurring in prismatic crystals, often twinned so as to form groups resembling a cross
Called also granatite, and grenatite
staurotide