Polyhalite and Moonstone Physical Properties

Polyhalite

Moonstone

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

2.782.56-2.60

1 7.18

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Fracture

Conchoidal

Uneven, ConchoidalWalter Schumann

Cleavage

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

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

Mohs Hardness

3.56-6.5

2 10

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Chemical Composition

K2Ca2Mg(SO4)4·2H2O

Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈

Polyhalite and Moonstone Chemical Formula

While comparing Polyhalite and Moonstone 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 Moonstone chemical formula.

Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈

Compare Red Gemstones

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Polyhalite Vs Piemontite

Polyhalite Vs Carnallite

Polyhalite and Moonstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Moonstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Moonstone Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.56-2.60 whereas that of Moonstone is 2.56-2.60.