Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.92.9-3.5
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{???} Indistinct
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
4.55.5-6
2
10
👆🏻
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)