Brucite and Common Opal Physical Properties

Brucite

Common Opal

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.39

1.98-2.50

1.5 Fracture

Irregular

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

Perfect on {0001}

Not Available

1.7 Mohs Hardness

2.5

5.5-6.5

1.8 Chemical Composition

Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Brucite and Common Opal Chemical Formula

While comparing Brucite 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 Brucite and Common Opal chemical formula.

Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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Brucite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brucite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brucite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Brucite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.