Turquoise and Harlequin Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.30-2.90
1.98-2.50
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
Good to perfect_usually N/A
Not Available
Mohs Hardness
5-6
5.5-6.5
Chemical Composition
CuAl6(PO4)4(OH)8 • 4H2O
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Turquoise and Harlequin Opal Chemical Formula
While comparing Turquoise 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 Turquoise and Harlequin Opal chemical formula.
- Chemical formula of Turquoise- CuAl6(PO4)4(OH)8 • 4H2O
- Chemical formula of Harlequin Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Turquoise and Harlequin Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Turquoise and Harlequin Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Harlequin Opal Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 1.98-2.50 whereas that of Harlequin Opal is 1.98-2.50.