1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.4 Solubility
Not Available
Not Available
1.2 Durability
Not Available
Not Available
1.5 Specific Gravity
2.97-3.141.98-2.50
1
7.18
1.9 Fracture
Uneven, Conchoidal, Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001)
1.11 Cleavage
{1011} Indistinct
Not Available
1.13 Mohs Hardness
Not Available5.5-6.5
2
10
1.16 Chemical Composition
Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)