Onyx and Montebrasite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
2.98-3.10
Fracture
Not Available
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Indiscernible
{100} Perfect, {110} Good, {011} Distinct
Mohs Hardness
6.5-7
5.5-6
Chemical Composition
SiO2
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Onyx and Montebrasite Chemical Formula
While comparing Onyx and Montebrasite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Onyx and Montebrasite chemical formula.
- Chemical formula of Onyx- SiO2
- Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Onyx and Montebrasite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Onyx and Montebrasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Montebrasite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.98-3.10 whereas that of Montebrasite is 2.98-3.10.