Labradorite and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.69-2.72
3.2-3.4
Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
[100] [001] perfect
Mohs Hardness
6-6.5
4-4.5
Chemical Composition
(Na,Ca)1-2Si3-2O8
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Labradorite and Purpurite Chemical Formula
While comparing Labradorite 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 Labradorite and Purpurite chemical formula.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Labradorite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Labradorite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.