Peridot and Purpurite Physical Properties

Peridot

Purpurite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.54-1.553.2-3.4

1 7.18

1.5 Fracture

Conchoidal

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Poor

[100] [001] perfect

1.7 Mohs Hardness

6.5-74-4.5

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

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

Peridot and Purpurite Chemical Formula

While comparing Peridot 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 Peridot and Purpurite chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Compare Semi Precious Gemstones

Peridot Vs Garnet

Peridot Vs Hackmanite

Peridot Vs Citrine

Peridot and Purpurite Specific Gravity

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