1 Physical Properties
2.2 Tenacity
2.4 Solubility
2.7 Durability
Not Available
Not Available
2.9 Specific Gravity
3.15-3.213.07-3.13
1
7.18
2.17 Fracture
Uneven, Subconchoidal, Gemstones (2009)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Uneven
2.18 Cleavage
Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°
{100} Perfect, {010} Distinct, {102} Distinct
2.19 Mohs Hardness
2.20 Chemical Composition
LiAlSi2O6
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references