Kyanite and Apophyllite Physical Properties

Kyanite

Apophyllite

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.652.30-2.50

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

Perfect on (001)

1.7 Mohs Hardness

4-74.5-5

2 10

1.8 Chemical Composition

Not Available

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Kyanite and Apophyllite Chemical Formula

While comparing Kyanite and Apophyllite 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 Apophyllite chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Compare Blue Gemstones

Kyanite Vs Blue quartz

Kyanite Vs Swiss blue topaz

Kyanite Vs Kashmir sapphire

Kyanite and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.