Kyanite and Agrellite Physical Properties

Kyanite

Agrellite

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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

3.53-3.652.88

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Not Available

1.6 Cleavage

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

perfect [110]

1.7 Mohs Hardness

4-75.5

2 10

1.8 Chemical Composition

Not Available

NaCa2Si4O10F

Kyanite and Agrellite Chemical Formula

While comparing Kyanite and Agrellite 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 Agrellite chemical formula.

Chemical formula of Agrellite- NaCa2Si4O10F

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Kyanite and Agrellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Agrellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Agrellite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.88 whereas that of Agrellite is 2.88.