Spinel and Pumpellyite Physical Properties

Spinel

Pumpellyite

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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

3.64-3.663.20-3.30

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

None, but may exhibit slight parting

Not Available

1.7 Mohs Hardness

85-6

2 10

1.8 Chemical Composition

MgAl₂O₄

Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

Spinel and Pumpellyite Chemical Formula

While comparing Spinel and Pumpellyite 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 Pumpellyite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Pumpellyite- Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

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Spinel and Pumpellyite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Pumpellyite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Pumpellyite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.20-3.30 whereas that of Pumpellyite is 3.20-3.30.