Purpurite and Precious Opal Physical Properties

Purpurite

Precious Opal

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.41.98-2.25

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

1.6 Cleavage

[100] [001] perfect

Not Available

1.7 Mohs Hardness

4-4.55-6.5

2 10

1.8 Chemical Composition

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

SiO 2 · nH 2OGemdat.org , Management Team (2012)

Purpurite and Precious Opal Chemical Formula

While comparing Purpurite and Precious Opal 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 Purpurite and Precious Opal chemical formula.

Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)

Compare Violet Gemstones

Purpurite Vs Sapphire

Purpurite Vs Sard

Purpurite Vs Sardonyx

Purpurite and Precious Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Purpurite and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Purpurite and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Purpurite is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.