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Transparency
Transparent - Translucent
Luster
Vitreous
Iolite
Locales
Hardness
7-7.5
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
Treatment
Interesting Fact
Gallery →
Chemical Formula
Composition
magnesium aluminum silicate
Colours
Blue
Purple
