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Gyrolite
Gyrolite
☒

Sardonyx
Sardonyx
☒



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Gyrolite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
2.48
Uneven
Perfect on {001}
2
NaCa16Si23AlO60(OH)8•64(H2O)
 
-
-
-
2.55-2.70
-
None
6.5-7
SiO 2Ulrich Henn and Claudio C.

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Sardonyx Vs Phlogopite

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