Polyhalite and Tourmaline Physical Properties

Polyhalite

Tourmaline

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.782.85-3.35

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

Indistinct

1.7 Mohs Hardness

3.57-7.5

2 10

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.

Polyhalite and Tourmaline Chemical Formula

While comparing Polyhalite 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 Polyhalite 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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Polyhalite and Tourmaline Specific Gravity

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