Spinel and Fire Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
none
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.64-3.66
1.97-2.22
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
None, but may exhibit slight parting
Not Available
Chemical Composition
MgAl2O4
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Spinel and Fire Opal Chemical Formula
While comparing Spinel and Fire Opal 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 Spinel and Fire Opal chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Spinel and Fire Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Fire Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Fire Opal Optical Properties during the identification of gemstone. Specific gravity of Spinel is 1.97-2.22 whereas that of Fire Opal is 1.97-2.22.