Polyhalite and Actinolite Physical Properties

Polyhalite

Actinolite

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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

2.783.00

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery

1.6 Cleavage

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

perfect along {110}.

1.7 Mohs Hardness

3.55-6

2 10

1.8 Chemical Composition

Not Available

Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.

Polyhalite and Actinolite Chemical Formula

While comparing Polyhalite and Actinolite 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 Actinolite chemical formula.

Chemical formula of Actinolite- Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.

Compare Red Gemstones

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Polyhalite Vs Heliotrope

Polyhalite and Actinolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Actinolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Actinolite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.00 whereas that of Actinolite is 3.00.