1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
Not Available2.50-3.00
1
7.18
1.5 Fracture
Sub-Conchoidal, Splintery
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
{201} Imperfect, {100} Poor, {001} Poor
3,6
1.7 Mohs Hardness
1.8 Chemical Composition
Not Available
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4