Londonite and Kyanite Physical Properties

Londonite

Kyanite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.343.53-3.65

1 7.18

1.5 Fracture

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

Splintery, Brittle, Metallic

1.6 Cleavage

None

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

1.7 Mohs Hardness

Not Available4-7

2 10

1.8 Chemical Composition

(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Not Available

Londonite and Kyanite Chemical Formula

While comparing Londonite 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 Londonite and Kyanite chemical formula.

Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

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Londonite and Kyanite Specific Gravity

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