Periclase and Opal Physical Properties

Periclase

Opal

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1 Physical Properties

1.1 Tenacity

Brittle

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

3.7-3.91.98-2.25

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

{001} perfect; {111} imperfect, may exhibit parting on , {011}

None

1.7 Mohs Hardness

5.5-65-6.5

2 10

1.8 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

Compare Gems Found In Australia

Periclase Vs Sapphire

Periclase Vs Rinkite Ce

Periclase Vs Scheelite

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.