Foitite and Tanzanite Physical Properties

Foitite

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

3.173.35

1 7.18

1.5 Fracture

Handbook of mineralogy (2001)

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

1.6 Cleavage

None

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

76.5-7

2 10

1.8 Chemical Composition

Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

Ca₂Al₃(SiO₄)₃(OH)

Foitite and Tanzanite Chemical Formula

While comparing Foitite 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 Foitite and Tanzanite chemical formula.

Chemical formula of Foitite- Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

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Foitite and Tanzanite Specific Gravity

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