Londonite and Sapphire Physical Properties

Londonite

Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.343.95-4.03

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

None

None, but may exhibit parting

1.7 Mohs Hardness

Not Available9

2 10

1.8 Chemical Composition

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

Al ₂ O ₃

Londonite and Sapphire Chemical Formula

While comparing Londonite and Sapphire 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 Sapphire chemical formula.

Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Sapphire- Al ₂ O ₃

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Londonite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Londonite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.