Star Sapphire and Annabergite Physical Properties

Star Sapphire

Annabergite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.053.07

1 7.18

1.5 Fracture

Not Available

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Not Available

Perfect on {010}, indistinct on {100} and {102}

1.7 Mohs Hardness

Not Available2

2 10

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

Ni3(AsO4)2•8(H2O)

Star Sapphire and Annabergite Chemical Formula

While comparing Star Sapphire and Annabergite 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 Annabergite chemical formula.

Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)

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Star Sapphire and Annabergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Annabergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Annabergite Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 3.07 whereas that of Annabergite is 3.07.