Hurlbutite and Polyhalite Physical Properties

Hurlbutite

Polyhalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.902.78

1 7.18

1.5 Fracture

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

Conchoidal, Brittle

1.6 Cleavage

None

Perfect on {10 1 }; parting on {010}

1.7 Mohs Hardness

63.5

2 10

1.8 Chemical Composition

CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Not Available

Hurlbutite and Polyhalite Chemical Formula

While comparing Hurlbutite and Polyhalite 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 Hurlbutite and Polyhalite chemical formula.

Chemical formula of Hurlbutite- CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Hurlbutite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hurlbutite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hurlbutite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Hurlbutite is 2.78 whereas that of Polyhalite is 2.78.