Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.783.32
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Good in three directions
{???} Distinct, {???} Distinct, {???} Distinct
Mohs Hardness
5-6-9999
2
10
👆🏻
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
LiFe3+ (PO 4)(OH)Anthony et al , Handbook of mineralogy (2001)