Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
2.55-2.632.74-3.00
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
{001} Perfect, {010} Good
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
6-6.55-5.5
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.