Tourmaline and Herderite Physical Properties

Tourmaline

Herderite

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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

2.85-3.352.90-3.02

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Indistinct

Indistinct on {110}

1.7 Mohs Hardness

7-7.55-5.5

2 10

1.8 Chemical Composition

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

CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Tourmaline and Herderite Chemical Formula

While comparing Tourmaline and Herderite 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 Tourmaline and Herderite 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.
Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.

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Tourmaline and Herderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tourmaline and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tourmaline and Herderite Optical Properties during the identification of gemstone. Specific gravity of Tourmaline is 2.90-3.02 whereas that of Herderite is 2.90-3.02.