Londonite and Calcite Physical Properties

Londonite

Calcite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.342.67-2.73

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

None

Perfect on [10 1 1] three directions with angle of 74° 55

1.7 Mohs Hardness

Not Available3

2 10

1.8 Chemical Composition

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

CaCO 3Ulrich Henn and Claudio C.

Londonite and Calcite Chemical Formula

While comparing Londonite and Calcite 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 Calcite 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 Calcite- CaCO 3Ulrich Henn and Claudio C.

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Londonite and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.