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441. Gyrolite. Crystaline

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Dana number

73.2.2c.1

Chemical formula

NaCa₁₆Si₂₃AlO₆₀(OH)₈.14H₂O

Crystal class

Triclinic

Mohs hardness

3 to 4

Specific gravity

2.36-2.45

Collected in

Poona, India

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