Sard and Harlequin Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.58-2.63
1.98-2.50
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
Not Available
Not Available
Mohs Hardness
6.5-7
5.5-6.5
Chemical Composition
SiO 2Ulrich Henn and Claudio C.
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Sard and Harlequin Opal Chemical Formula
While comparing Sard and Harlequin 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 Sard and Harlequin Opal chemical formula.
- Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.
- Chemical formula of Harlequin Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Sard and Harlequin Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sard and Harlequin Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sard and Harlequin Opal Optical Properties during the identification of gemstone. Specific gravity of Sard is 1.98-2.50 whereas that of Harlequin Opal is 1.98-2.50.