Kyanite and Ludlamite Physical Properties

Kyanite

Ludlamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.653.1-3.2

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

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

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

Vitreous, pearly on cleavage

1.7 Mohs Hardness

4-73-4

2 10

1.8 Chemical Composition

Not Available

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

Kyanite and Ludlamite Chemical Formula

While comparing Kyanite 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 Kyanite and Ludlamite chemical formula.

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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Kyanite and Ludlamite Specific Gravity

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