Rossmanite and Spinel Physical Properties

Rossmanite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

33.64-3.66

1 7.18

1.5 Fracture

Brittle, Metallic

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

None, but may exhibit slight parting

1.7 Mohs Hardness

Not Available8

2 10

1.8 Chemical Composition

◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

MgAl₂O₄

Rossmanite and Spinel Chemical Formula

While comparing Rossmanite 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 Rossmanite and Spinel chemical formula.

Chemical formula of Rossmanite- ◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Spinel- MgAl₂O₄

Compare Gems Found in America

Rossmanite Vs Serpentine

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Rossmanite and Spinel Specific Gravity

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