Almandine and Precious Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.95-4.30
1.98-2.25
Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
Cleavage
none
Not Available
Mohs Hardness
7-7.5
5-6.5
Chemical Composition
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
SiO 2 · nH 2OGemdat.org , Management Team (2012)
Almandine and Precious Opal Chemical Formula
While comparing Almandine and Precious 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 Almandine and Precious Opal chemical formula.
- Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Almandine and Precious Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Almandine and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Almandine is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.