Kyanite and Moonstone Physical Properties

Kyanite

Moonstone

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.652.56-2.60

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

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

1.7 Mohs Hardness

4-76-6.5

2 10

1.8 Chemical Composition

Not Available

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

Kyanite and Moonstone Chemical Formula

While comparing Kyanite 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 Kyanite and Moonstone chemical formula.

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

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Kyanite and Moonstone Specific Gravity

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