Adamite and Common Opal Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.32-4.48
1.98-2.50
Fracture
Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
{101}, good; {010}, poor
Not Available
Mohs Hardness
3.5
5.5-6.5
Chemical Composition
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Adamite and Common Opal Chemical Formula
While comparing Adamite and Common 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 Adamite and Common Opal chemical formula.
- Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Adamite and Common Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Adamite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Adamite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Adamite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.