Cassiterite and Purpurite Physical Properties

Cassiterite

Purpurite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.86-7.033.2-3.4

1 7.18

1.5 Fracture

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{100} imperfect, {110} indistinct; partings on {111} or {011}

[100] [001] perfect

1.7 Mohs Hardness

6-74-4.5

2 10

1.8 Chemical Composition

SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Cassiterite and Purpurite Chemical Formula

While comparing Cassiterite and Purpurite 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 Cassiterite and Purpurite chemical formula.

Chemical formula of Cassiterite- SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

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Cassiterite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cassiterite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cassiterite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Cassiterite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.