Lazurite and Ludlamite Physical Properties

Lazurite

Ludlamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.75

3.1-3.2

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle

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

1.6 Cleavage

Imperfect on {110}

Vitreous, pearly on cleavage

1.7 Mohs Hardness

5.5

3-4

1.8 Chemical Composition

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

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

Lazurite and Ludlamite Chemical Formula

While comparing Lazurite 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 Lazurite and Ludlamite chemical formula.

Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
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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Lazurite and Ludlamite Specific Gravity

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