Rossmanite and Tanzanite Physical Properties

Rossmanite

Tanzanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

33.35

1 7.18

1.5 Fracture

Brittle, Metallic

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

None

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

Not Available6.5-7

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 Tanzanite Chemical Formula

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

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Rossmanite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rossmanite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rossmanite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Rossmanite is 3.35 whereas that of Tanzanite is 3.35.