Kyanite and Poldervaartite Physical Properties

Kyanite

Poldervaartite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.652.91

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Handbook of mineralogy (2001)

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

None

1.7 Mohs Hardness

4-7Not Available

2 10

1.8 Chemical Composition

Not Available

(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Kyanite and Poldervaartite Chemical Formula

While comparing Kyanite and Poldervaartite 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 Kyanite and Poldervaartite chemical formula.

Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

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Kyanite and Poldervaartite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Poldervaartite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Poldervaartite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.91 whereas that of Poldervaartite is 2.91.