Moonstone and Sylvite Physical Properties

Moonstone

Sylvite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

2.56-2.601.993

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Uneven

Cleavage

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

Perfect on [100], [010], [001]

Mohs Hardness

6-6.52.5

2 10

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Chemical Composition

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

KCl

Moonstone and Sylvite Chemical Formula

While comparing Moonstone and Sylvite 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 Moonstone and Sylvite chemical formula.

Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈
Chemical formula of Sylvite- KCl

Compare Semi Precious Gemstones

Moonstone Vs Rubellite

Moonstone Vs Schorlomite

Moonstone Vs Simpsonite

Moonstone and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Moonstone and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Moonstone and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Moonstone is 1.993 whereas that of Sylvite is 1.993.