Arfvedsonite and Tourmaline Physical Properties

Arfvedsonite

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

3.3-3.52.85-3.35

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic, Brittle, Metallic

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on [110]

Indistinct

1.7 Mohs Hardness

5-67-7.5

2 10

1.8 Chemical Composition

NaNa2(Fe++4Fe+++)Si8O22(OH)2

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

Arfvedsonite and Tourmaline Chemical Formula

While comparing Arfvedsonite 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 Arfvedsonite and Tourmaline chemical formula.

Chemical formula of Arfvedsonite- NaNa2(Fe++4Fe+++)Si8O22(OH)2
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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Arfvedsonite and Tourmaline Specific Gravity

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