Opal and Fayalite Physical Properties
Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
4.392
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
None
{010} moderate, {100} imperfect
Mohs Hardness
5-6.5
6.5-7
Chemical Composition
SiO2 · nH2O
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Opal and Fayalite Chemical Formula
While comparing Opal and Fayalite 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 Opal and Fayalite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Opal and Fayalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Opal is 4.392 whereas that of Fayalite is 4.392.
