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
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Brittle
1.6 Cleavage
1,2 prismatic.
Perfect on {001}, good on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
(Ca,Cr)MgSi 2O 6Gemdat.org , Management Team (2012)
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)