Periclase and Common Opal Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.7-3.9
1.98-2.50
Fracture
Conchoidal, Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
{001} perfect; {111} imperfect, may exhibit parting on , {011}
Not Available
Mohs Hardness
5.5-6
5.5-6.5
Chemical Composition
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Periclase and Common Opal Chemical Formula
While comparing Periclase 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 Periclase and Common Opal chemical formula.
- Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Periclase and Common Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Periclase and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Periclase and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Periclase is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.