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
Uneven, Even, Yellow, White
Uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on the {001}
perfect along [010] and [100]
1.7 Mohs Hardness
1.8 Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references