Londonite and Dumortierite Physical Properties

Londonite

Dumortierite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.343.26-3.41

1 7.18

1.5 Fracture

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

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

None

Distinct on {100}, poor on {110}; parting on {001}

1.7 Mohs Hardness

Not Available7-8.5

2 10

1.8 Chemical Composition

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

AlAl₆O₃BSi₃O₁₈

Londonite and Dumortierite Chemical Formula

While comparing Londonite and Dumortierite 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 Dumortierite 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 Dumortierite- AlAl₆O₃BSi₃O₁₈

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Londonite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.