Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.32-3.432.24-2.29
1
7.18
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Fracture
Conchoidal
Uneven, Subconchoidal, Conchoidal
Cleavage
Poor on {110} and {100} very poor on {001}
Very poor [100]
Mohs Hardness
6-75-5.5
2
10
👆🏻
Chemical Composition
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references