Topaz and Dioptase Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.49-3.57
3.25-3.35
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Cleavage
[001] Perfect
Perfect in three directions
Chemical Composition
Al2SiO4(F,OH)2
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Topaz and Dioptase Chemical Formula
While comparing Topaz 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 Topaz and Dioptase chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Dioptase- CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Topaz and Dioptase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Dioptase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Dioptase Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.25-3.35 whereas that of Dioptase is 3.25-3.35.