Brucite and Spinel Physical Properties

Brucite

Spinel

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.393.64-3.66

1 7.18

1.5 Fracture

Irregular

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {0001}

None, but may exhibit slight parting

1.7 Mohs Hardness

2.58

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Brucite and Spinel Chemical Formula

While comparing Brucite and Spinel 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 Spinel chemical formula.

Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Spinel- MgAl₂O₄

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Brucite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brucite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brucite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Brucite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.