Pearl and Polyhalite Physical Properties

Pearl

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

2.60-2.852.78

1 7.18

1.5 Fracture

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

Conchoidal, Brittle

1.6 Cleavage

none

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

1.7 Mohs Hardness

2.5-4.53.5

2 10

1.8 Chemical Composition

Not Available

Pearl and Polyhalite Chemical Formula

While comparing Pearl 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 Pearl and Polyhalite chemical formula.

Compare Blue Gemstones

Pearl Vs Precious Opal

Pearl Vs Prase

Pearl Vs Prase Opal

Pearl and Polyhalite Specific Gravity

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