Tenacity
-
Brittle
Solubility
-
Poorly soluble in dilute HCl
Durability
-
-
Specific Gravity
2.25-2.402.80-2.95
1
7.18
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Fracture
-
Conchoidal
Cleavage
perfect on {010}; good on {100}
Perfect on {10 1 1}, rhombohedral cleavage
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references