Polyhalite and Starlite Physical Properties

Polyhalite

Starlite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.91-4.73

1 7.18

1.5 Fracture

Conchoidal, Brittle

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

3.56.5-7.5

2 10

1.8 Chemical Composition

Not Available

ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Polyhalite and Starlite Chemical Formula

While comparing Polyhalite and Starlite 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 Polyhalite and Starlite chemical formula.

Chemical formula of Starlite- ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Red Gemstones

Polyhalite Vs Heliotrope

Polyhalite Vs Jacinth

Polyhalite Vs Vanadinite

Polyhalite and Starlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Starlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Starlite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.91-4.73 whereas that of Starlite is 3.91-4.73.