Staurolite

Hardness ( Moh )

" 7 - 7.5

Crystal System

Monoclinic

Specific Gravity

3.7

Refractive Index

1.736 - 1.762

Birefringence

Family

Colour(s)

Brownish yellow, Brownish black, Yellow brown, Dark brown, Reddish brown.

Cleavage

Francture Type

Subconchoidal

Luster

Streak

White to Grey

Transparency

Transparent to opaque

Formula

Fe2+2Al9O6(SiO4)4(O,OH)2

Country

Found In Afghanistan,Andorra,Antarctica,Argentina,Australia,Austria,Bolivia,Brazil,Bulgaria,Burundi,Canada,China,Czech Republic,DR Congo,Egypt,Ethiopia,Finland,France,Germany,Ghana,Greece,Hungary,India,Ireland,Italy,Ivory Coast,Japan,Kazakhstan,Madagascar,Malawi,Mexico,Morocco,Mozambique,Myanmar,Namibia,Nepal,New Zealand,North Macedonia,Norway,Pakistan,Poland,Portugal,Romania,Russia,Slovakia,Somalia,South Africa,Spain,Sri Lanka,Sudan,Sweden,Switzerland,Tanzania,Thailand,Turkey,Uganda,UK,Ukraine,USA,Vietnam,Zambia,Zimbabwe