Kyanite and Emerald Physical Properties

Kyanite

Emerald

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

3.53-3.65

2.67-2.78

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

Imperfect on the [0001]

1.7 Mohs Hardness

4-7

7.5-8

1.8 Chemical Composition

Not Available

Be₃Al₂SiO₆

Kyanite and Emerald Chemical Formula

While comparing Kyanite and Emerald 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 Emerald chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆

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Kyanite and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.