Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
2.65-2.902.74-3.00
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
{001} Perfect
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
-99995-5.5
2
10
👆🏻
Chemical Composition
Al 2Si 4O 10(OH) 2Michael 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.