Moonstone and Topaz Physical Properties

Moonstone

Topaz

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.56-2.603.49-3.57

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Subconchoidal, Uneven, Conchoidal

Cleavage

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

[001] Perfect

Mohs Hardness

6-6.58

2 10

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Chemical Composition

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

Al₂SiO₄(F,OH)₂

Moonstone and Topaz Chemical Formula

While comparing Moonstone and Topaz 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 Topaz chemical formula.

Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

Compare Semi Precious Gemstones

Moonstone Vs Rubellite

Moonstone Vs Schorlomite

Moonstone Vs Simpsonite

Moonstone and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Moonstone and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Moonstone and Topaz Optical Properties during the identification of gemstone. Specific gravity of Moonstone is 3.49-3.57 whereas that of Topaz is 3.49-3.57.