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Transparency

Transparent - Translucent

Luster

Vitreous

Tanzanite

Locales

Hardness

6.5
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10

Treatment

Interesting Fact

Chemical Formula

Composition

calcium aluminum silicate with hydroxyl

Colours

Purple
Blue