Idocrase

Hardness ( Moh )

" 6.5

Crystal System

Tertagonal

Specific Gravity

3.38

Refractive Index

1.655 - 1.761

Birefringence

Family

Colour(s)

Yellow, green, brown; colorless to white, blue, violet, bluish green, pink, red, black, commonly zoned

Cleavage

Francture Type

Subconchoidal

Luster

Streak

White

Transparency

Transparent

Formula

Ca10(Mg, Fe)2Al4(SiO4)5(Si2O7)2(OH,F)4

Country

Found In Afghanistan,Antarctica,Argentina,Australia,Austria,Azerbaijan,Brazil,Bulgaria,Cameroon,Canada,China,Cuba,Czech Republic,Finland,France,Germany,Ghana,Greece,Greenland,Hungary,India,Indonesia,Iran,Ireland,Italy,Ivory Coast,Jamaica,Japan,Kazakhstan,Kyrgyzstan,Madagascar,Malaysia,Mali,Mexico,Middle East,Mongolia,Montenegro,Morocco,Myanmar,Namibia,New Zealand,North Korea,North Macedonia,Norway,Pakistan,Papua New Guinea,Peru,Philippines,Poland,Portugal,Romania,Russia,Serbia,Slovakia,South Africa,South Korea,Spain,Sudan,Sweden,Switzerland,Taiwan,Tajikistan,Thailand,Turkey,UK,Ukraine,USA,Uzbekistan