Londonite and Ludlamite Physical Properties

Londonite

Ludlamite

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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

3.343.1-3.2

1 7.18

1.5 Fracture

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

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

Vitreous, pearly on cleavage

1.7 Mohs Hardness

Not Available3-4

2 10

1.8 Chemical Composition

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

(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Londonite and Ludlamite Chemical Formula

While comparing Londonite and Ludlamite 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 Ludlamite 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 Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Londonite and Ludlamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.