1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
1.6 Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
Imperfect- [10 1 1]
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)