Brucite and Petalite Physical Properties

Brucite

Petalite

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1 Physical Properties

1.1 Tenacity

Sectile

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.392.40

1 7.18

1.5 Fracture

Irregular

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

1.6 Cleavage

Perfect on {0001}

Perfect on {001}, poor on {201} with 38.5° angle between the two

1.7 Mohs Hardness

2.56-6.5

2 10

1.8 Chemical Composition

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

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Brucite and Petalite Chemical Formula

While comparing Brucite and Petalite 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 Petalite chemical formula.

Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Brucite Vs Chrome Tourmaline

Brucite Vs Chrysocolla

Brucite Vs Common Opal

Brucite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brucite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brucite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Brucite is 2.40 whereas that of Petalite is 2.40.