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351. Charoite. Massive

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Dana number

70.1.2.3

Chemical formula

K₅Ca₈(Si₆O₁₅)₂(Si₂O₇)Si₄O₉(OH).3H₂O

Crystal class

Monoclinic

Mohs hardness

5 to 6

Specific gravity

2.54-2.58

Collected in

Unknown, Russia

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