Bertrandite and Tourmaline Physical Properties

Bertrandite

Tourmaline

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.59-2.602.85-3.35

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{001} Perfect, {110} Distinct, {101} Distinct

Indistinct

1.7 Mohs Hardness

6-77-7.5

2 10

1.8 Chemical Composition

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

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

Bertrandite and Tourmaline Chemical Formula

While comparing Bertrandite 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 Bertrandite and Tourmaline chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
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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Bertrandite and Tourmaline Specific Gravity

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