Star Sapphire and Boulder Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
1.98-2.25
Fracture
Not Available
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
Not Available
Mohs Hardness
Not Available
5-6.5
Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
SiO 2 + H 2OUlrich Henn and Claudio C.
Star Sapphire and Boulder Opal Chemical Formula
While comparing Star Sapphire and Boulder 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 Star Sapphire and Boulder Opal chemical formula.
- Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
- Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Star Sapphire and Boulder Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Star Sapphire and Boulder Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Boulder Opal Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 1.98-2.25 whereas that of Boulder Opal is 1.98-2.25.