Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.95.00-5.30
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{???} Indistinct
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
4.56
2
10
👆🏻
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Fe 2O 3Arthur Thomas , Gemstones (2009)