Ludlamite and Spinel Physical Properties

Ludlamite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

3.1-3.23.64-3.66

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Vitreous, pearly on cleavage

None, but may exhibit slight parting

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

MgAl₂O₄

Ludlamite and Spinel Chemical Formula

While comparing Ludlamite and Spinel 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 Spinel 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 Spinel- MgAl₂O₄

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Ludlamite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ludlamite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ludlamite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Ludlamite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.