Phenakite and Common Opal Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-2.98
1.98-2.50
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
Distinct on {11 2 0}, imperfect on {10 1 1}
Not Available
Mohs Hardness
7.5-8
5.5-6.5
Chemical Composition
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Phenakite and Common Opal Chemical Formula
While comparing Phenakite 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 Phenakite and Common Opal chemical formula.
- Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Phenakite and Common Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phenakite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.