Tenacity
Brittle
-
Solubility
H₂SO₄
-
Durability
-
-
Specific Gravity
2.74-3.003.07-3.13
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven
Cleavage
Distinct on {0001} imperfect on {11 2 0}
{100} Perfect, {010} Distinct, {102} Distinct
Mohs Hardness
5-5.53-3.5
2
10
👆🏻
Chemical Composition
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references