Tenacity
-
Brittle
Solubility
-
H₂SO₄
Durability
-
-
Specific Gravity
3.07-3.132.74-3.00
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
Distinct on {0001} imperfect on {11 2 0}
Mohs Hardness
3-3.55-5.5
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 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.