Polyhalite and Carnelian Physical Properties

Polyhalite

Carnelian

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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

2.782.58-2.64

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

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

Absent

1.7 Mohs Hardness

3.56.5-7

2 10

1.8 Chemical Composition

Not Available

SiO₂

Polyhalite and Carnelian Chemical Formula

While comparing Polyhalite and Carnelian 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 Carnelian chemical formula.

Chemical formula of Carnelian- SiO₂

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Polyhalite and Carnelian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Carnelian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Carnelian Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.58-2.64 whereas that of Carnelian is 2.58-2.64.