Kyanite and Edenite Physical Properties

Kyanite

Edenite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.653.05-3.37

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

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

Good on (110)

1.7 Mohs Hardness

4-75-6

2 10

1.8 Chemical Composition

Not Available

NaCa2Mg5Si7AlO22(OH)2

Kyanite and Edenite Chemical Formula

While comparing Kyanite and Edenite 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 Edenite chemical formula.

Chemical formula of Edenite- NaCa2Mg5Si7AlO22(OH)2

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Kyanite and Edenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Edenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Edenite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.05-3.37 whereas that of Edenite is 3.05-3.37.