Willemite

Hardness ( Moh )

" 5.5

Crystal System

Trigonal

Specific Gravity

4.03

Refractive Index

1.690 - 1.723

Birefringence

Family

Colour(s)

Orange. Green, Light brown, White

Cleavage

Francture Type

Luster

Streak

White

Transparency

Transparent to opaque

Formula

Zn2[SiO4]

Country

Found In Argentina,Australia,Austria,Belgium,Botswana,Brazil,Canada,Chile,China,Czech Republic,DR Congo,Egypt,Finland,France,Germany,Greece,Greenland,India,Indonesia,Iran,Ireland,Italy,Japan,Mexico,Mongolia,Morocco,Myanmar,Namibia,Niger,Norway,Peru,Poland,Portugal,Republic of the Congo,Russia,Slovakia,Spain,Sweden,Tajikistan,Tunisia,UK,Ukraine,USA,Yemen,Zambia