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Fibrolite
Fibrolite

Apophyllite KF
Apophyllite KF



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Fibrolite
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Apophyllite KF
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.14-3.25
-
Perfect
6-7
Al 2SiO 5Arthur Thomas , Gemstones (2009)
 
Brittle
-
-
2.33-2.37
Uneven
Perfect on {001}, imperfect on {110}
4.5-5
(K,Na)Ca4Si8O20(F,OH)•8(H2O)