Tourmaline and Amethyst Physical Properties

Tourmaline

Amethyst

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble in common solvents

1.3 Durability

Not Available

1.4 Specific Gravity

2.85-3.35

2.65

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Indistinct

Indiscernible

1.7 Mohs Hardness

7-7.5

1.8 Chemical Composition

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

SiO₂

Tourmaline and Amethyst Chemical Formula

While comparing Tourmaline and Amethyst 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 Amethyst 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 Amethyst- SiO₂

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Tourmaline and Amethyst Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tourmaline and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tourmaline and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Tourmaline is 2.65 whereas that of Amethyst is 2.65.