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Lawsonite
Lawsonite

Pollucite
Pollucite



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Lawsonite
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Pollucite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.09
Uneven
Perfect on {100} and {010}, imperfect on {101}
8
CaAl2Si2O7(OH)2.H2O
 
Brittle
Readily soluble in HF
-
2.86-2.94
Conchoidal, Uneven
None observed
6.5-7
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references