Periclase and Opal Physical Properties
Tenacity
Brittle
BrittleWalter Schumann
Solubility
Not Available
hot salt water
Durability
Not Available
Not Available
Specific Gravity
3.7-3.9
1.98-2.25
Fracture
Conchoidal, Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Cleavage
{001} perfect; {111} imperfect, may exhibit parting on , {011}
None
Mohs Hardness
5.5-6
5-6.5
Chemical Composition
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
SiO2 · nH2O
Periclase and Opal Chemical Formula
While comparing Periclase and 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 Opal chemical formula.
- Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Opal- SiO2 · nH2O
Periclase and Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Periclase and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Periclase and Opal Optical Properties during the identification of gemstone. Specific gravity of Periclase is 1.98-2.25 whereas that of Opal is 1.98-2.25.