Spinel and Diaspore Physical Properties

Spinel

Diaspore

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1 Physical Properties

1.1 Tenacity

Not Available

Very brittle

1.2 Solubility

none

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.663.30-3.40

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

None, but may exhibit slight parting

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

86.5-7

2 10

1.8 Chemical Composition

MgAl₂O₄

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Spinel and Diaspore Chemical Formula

While comparing Spinel and Diaspore 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 Diaspore chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Spinel and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.