Rossmanite and Thulite Physical Properties

Rossmanite

Thulite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

33.1

1 7.18

1.5 Fracture

Brittle, Metallic

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

Perfect {010} imperfect {100}

1.7 Mohs Hardness

Not Available6-7

2 10

1.8 Chemical Composition

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

Ca₂Al₃(SiO₄)₃(OH)

Rossmanite and Thulite Chemical Formula

While comparing Rossmanite and Thulite 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 Thulite 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 Thulite- Ca₂Al₃(SiO₄)₃(OH)

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Rossmanite and Thulite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rossmanite and Thulite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rossmanite and Thulite Optical Properties during the identification of gemstone. Specific gravity of Rossmanite is 3.1 whereas that of Thulite is 3.1.