Afghanite and Annabergite Physical Properties

Afghanite

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

2.55-2.653.07

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Perfect {10 1 0}

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

1.7 Mohs Hardness

5.5-62

2 10

1.8 Chemical Composition

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Ni3(AsO4)2•8(H2O)

Afghanite and Annabergite Chemical Formula

While comparing Afghanite 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 Afghanite and Annabergite chemical formula.

Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)

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Afghanite and Annabergite Specific Gravity

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