Andradite and Purpurite Physical Properties

Andradite

Purpurite

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-4.103.2-3.4

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

none

[100] [001] perfect

1.7 Mohs Hardness

6.5-74-4.5

2 10

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Andradite and Purpurite Chemical Formula

While comparing Andradite 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 Andradite and Purpurite chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Compare Green Gemstones

Andradite Vs Augite

Andradite Vs Aragonite

Andradite Vs Astrophyllite

Andradite and Purpurite Specific Gravity

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