Onyx and Dioptase Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
3.25-3.35
Fracture
Not Available
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Cleavage
Indiscernible
Perfect in three directions
Chemical Composition
SiO2
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Onyx and Dioptase Chemical Formula
While comparing Onyx and Dioptase 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 Dioptase chemical formula.
- Chemical formula of Onyx- SiO2
- Chemical formula of Dioptase- CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Onyx and Dioptase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Onyx and Dioptase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Dioptase Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.25-3.35 whereas that of Dioptase is 3.25-3.35.