Spinel and Legrandite Physical Properties

Spinel

Legrandite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.663.98-4.04

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

None, but may exhibit slight parting

Imperfect, poor one {100}

1.7 Mohs Hardness

84.5-5

2 10

1.8 Chemical Composition

MgAl₂O₄

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Spinel and Legrandite Chemical Formula

While comparing Spinel and Legrandite 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 Legrandite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Spinel and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.