Andesine and Common Opal Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.65-2.69
1.98-2.50
Fracture
Uneven, Uneven, Conchoidal, Uneven, Gems, Sixth Edition (2006)
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
Perfect on {001}, good on {010}
Not Available
Mohs Hardness
6-6.5
5.5-6.5
Chemical Composition
(Na,Ca)Al1-2Si3-2O8
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Andesine and Common Opal Chemical Formula
While comparing Andesine 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 Andesine and Common Opal chemical formula.
- Chemical formula of Andesine- (Na,Ca)Al1-2Si3-2O8
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Andesine and Common Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andesine and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andesine and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Andesine is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.