Boulder Opal and Emerald Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Hard
Specific Gravity
1.98-2.25
2.67-2.78
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Not Available
Imperfect on the [0001]
Mohs Hardness
5-6.5
7.5-8
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Be3Al2SiO6
Boulder Opal and Emerald Chemical Formula
While comparing Boulder Opal and Emerald 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 Boulder Opal and Emerald chemical formula.
- Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Emerald- Be3Al2SiO6
Boulder Opal and Emerald Specific Gravity
Another important criteria for qualitative analysis of gemstones is Boulder Opal and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Emerald Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 2.67-2.78 whereas that of Emerald is 2.67-2.78.