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London blue topaz
London blue topaz

Ludlamite
Ludlamite



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London blue topaz
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Ludlamite

London blue topaz and Ludlamite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
-
None
-9999
Al2SiO4(F,OH)2
 
-
-
-
3.1-3.2
-
Vitreous, pearly on cleavage
3-4
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

London blue topaz and Ludlamite Chemical Formula

While comparing London blue topaz 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 London blue topaz and Ludlamite chemical formula.

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London blue topaz and Ludlamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is London blue topaz and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use London blue topaz Vs Ludlamite during the identification of gemstone. Specific gravity of London blue topaz is whereas that of Ludlamite is .