Apophyllite KF and Tourmaline Physical Properties

Apophyllite KF

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

2.33-2.372.85-3.35

1 7.18

1.5 Fracture

Uneven, Brittle, Uneven, Brittle, Uneven

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {001}, imperfect on {110}

Indistinct

1.7 Mohs Hardness

4.5-57-7.5

2 10

1.8 Chemical Composition

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

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

Apophyllite KF and Tourmaline Chemical Formula

While comparing Apophyllite KF 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 Apophyllite KF and Tourmaline chemical formula.

Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
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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Apophyllite KF Vs Nepouite

Apophyllite KF and Tourmaline Specific Gravity

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