1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
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1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
White, Yellow, Pale blue, Brittle, Uneven
1.6 Cleavage
Good in three directions
Perfect on {100} and {010}, imperfect on {101}
1.7 Mohs Hardness
1.13 Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Not Available