Star Sapphire and Apophyllite KF Physical Properties

Star Sapphire

Apophyllite KF

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.052.33-2.37

1 7.18

1.5 Fracture

Not Available

Uneven, Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Not Available

Perfect on {001}, imperfect on {110}

1.7 Mohs Hardness

Not Available4.5-5

2 10

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Star Sapphire and Apophyllite KF Chemical Formula

While comparing Star Sapphire and Apophyllite KF 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 Star Sapphire and Apophyllite KF chemical formula.

Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)

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Star Sapphire and Apophyllite KF Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Apophyllite KF Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 2.33-2.37 whereas that of Apophyllite KF is 2.33-2.37.