1 Physical Properties
1.2 Tenacity
1.4 Solubility
Not Available
Not Available
1.7 Durability
Not Available
Not Available
1.10 Specific Gravity
2.54-2.783.70-3.90
1
7.18
1.17 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.18 Cleavage
Good in three directions
Perfect on {011}, fair on {100}, poor on {110}
1.19 Mohs Hardness
1.20 Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references