1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.3 Solubility
Not Available
Not Available
1.5 Durability
Not Available
Not Available
1.7 Specific Gravity
1.8 Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
1.9 Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
{111} Imperfect
1.10 Mohs Hardness
1.11 Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Na 4AlBeSi 4O 12ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references