Sapphirine and Common Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.40-3.58
1.98-2.50
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Uneven
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
{010} Perfect
Not Available
Mohs Hardness
7.5
5.5-6.5
Chemical Composition
(Al,Mg) 8(Al,Si) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Sapphirine and Common Opal Chemical Formula
While comparing Sapphirine and Common 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 Sapphirine and Common Opal chemical formula.
- Chemical formula of Sapphirine- (Al,Mg) 8(Al,Si) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Sapphirine and Common Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphirine and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphirine and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Sapphirine is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.