Kyanite and Tourmaline Physical Properties

Kyanite

Tourmaline

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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

3.53-3.65

2.85-3.35

1.5 Fracture

Splintery, Brittle, Metallic

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

Indistinct

1.7 Mohs Hardness

4-7

7-7.5

1.8 Chemical Composition

Not Available

Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

Kyanite and Tourmaline Chemical Formula

While comparing Kyanite and Tourmaline 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 Tourmaline chemical formula.

Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

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Kyanite and Tourmaline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.