Adamite and Gypsum Physical Properties

Adamite

Gypsum

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1 Physical Properties

1.1 Tenacity

Brittle

Flexible

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

4.32-4.48

2.20-2.40

1.5 Fracture

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

{101}, good; {010}, poor

Perfect on {010}, distinct on {100}

1.7 Mohs Hardness

3.5

1.8 Chemical Composition

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Adamite and Gypsum Chemical Formula

While comparing Adamite and Gypsum 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 Adamite and Gypsum chemical formula.

Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

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Adamite and Gypsum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Adamite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Adamite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Adamite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.