Topaz and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
3.49-3.57
1.77
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Not Available
Cleavage
[001] Perfect
Perfect on {10 1 0}
Chemical Composition
Al2SiO4(F,OH)2
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Topaz and Ettringite Chemical Formula
While comparing Topaz and Ettringite 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 Ettringite chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Topaz and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 1.77 whereas that of Ettringite is 1.77.