Ludlamite and Topaz Physical Properties

Ludlamite

Topaz

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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

3.1-3.23.49-3.57

1 7.18

1.5 Fracture

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

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Vitreous, pearly on cleavage

[001] Perfect

1.7 Mohs Hardness

3-48

2 10

1.8 Chemical Composition

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

Al₂SiO₄(F,OH)₂

Ludlamite and Topaz Chemical Formula

While comparing Ludlamite and Topaz 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 Ludlamite and Topaz chemical formula.

Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Ludlamite and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ludlamite and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ludlamite and Topaz Optical Properties during the identification of gemstone. Specific gravity of Ludlamite is 3.49-3.57 whereas that of Topaz is 3.49-3.57.