Londonite and Datolite Physical Properties

Londonite

Datolite

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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

3.342.90-3.00

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

None

1.7 Mohs Hardness

Not Available5-5.5

2 10

1.8 Chemical Composition

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

CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Londonite and Datolite Chemical Formula

While comparing Londonite and Datolite 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 Datolite 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 Datolite- CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Londonite and Datolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Datolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Datolite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 2.90-3.00 whereas that of Datolite is 2.90-3.00.