1 Physical Properties
1.2 Tenacity
1.5 Solubility
Not Available
Not Available
1.6 Durability
Not Available
Not Available
1.7 Specific Gravity
1.10 Fracture
Brittle, Metallic, Brittle, Metallic
Conchoidal, Conchoidal, Brittle
1.11 Cleavage
{010} Perfect
Perfect on {001}, good on {110}
1.12 Mohs Hardness
1.17 Chemical Composition
CaZnSiO 4 · H 2OAnthony et al , Handbook of mineralogy (2001)
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)