Opal and Bustamite Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Partly soluble in HCl.
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
3.32-3.43
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
None
{100} perfect; {110} and {1 1 0} good; {010} poor
Mohs Hardness
5-6.5
5.5-6
Chemical Composition
SiO2 · nH2O
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Bustamite Chemical Formula
While comparing Opal and Bustamite 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 Bustamite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Bustamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Opal is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.