Amethyst and Kyanite Physical Properties

Amethyst

Kyanite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

insoluble in common solvents

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.653.53-3.65

1 7.18

1.5 Fracture

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

Splintery, Brittle, Metallic

1.6 Cleavage

Indiscernible

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

1.7 Mohs Hardness

74-7

2 10

1.8 Chemical Composition

SiO₂

Not Available

Amethyst and Kyanite Chemical Formula

While comparing Amethyst and Kyanite 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 Amethyst and Kyanite chemical formula.

Chemical formula of Amethyst- SiO₂

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Amethyst and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Amethyst and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.