Spinel and Ludlamite Physical Properties

Spinel

Ludlamite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.663.1-3.2

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

None, but may exhibit slight parting

Vitreous, pearly on cleavage

1.7 Mohs Hardness

83-4

2 10

1.8 Chemical Composition

MgAl₂O₄

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

Spinel and Ludlamite Chemical Formula

While comparing Spinel 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 Spinel and Ludlamite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
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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Spinel and Ludlamite Specific Gravity

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