Topaz and Forsterite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.49-3.57
3.23-3.26
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
[001] Perfect
Perfect on {010} imperfect on {100}
Chemical Composition
Al2SiO4(F,OH)2
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Topaz and Forsterite Chemical Formula
While comparing Topaz and Forsterite 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 Forsterite chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Forsterite- Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Topaz and Forsterite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.