Dolomite and Spinel Physical Properties

Dolomite

Spinel

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Poorly soluble in dilute HCl

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.80-2.953.64-3.66

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {10 1 1}, rhombohedral cleavage

None, but may exhibit slight parting

1.7 Mohs Hardness

3.5-48

2 10

1.8 Chemical Composition

CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

MgAl₂O₄

Dolomite and Spinel Chemical Formula

While comparing Dolomite 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 Dolomite and Spinel chemical formula.

Chemical formula of Dolomite- CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Spinel- MgAl₂O₄

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Dolomite and Spinel Specific Gravity

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