Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
2.24-2.292.74-3.00
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Uneven
Cleavage
Very poor [100]
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
5-5.55-5.5
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.