Labradorite and Prehnite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.69-2.72
2.80-2.95
Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Distinct on [001]
Mohs Hardness
6-6.5
6-6.5
Chemical Composition
(Na,Ca)1-2Si3-2O8
Ca2Al2Si3O12(OH)
Labradorite and Prehnite Chemical Formula
While comparing Labradorite and Prehnite 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 Prehnite chemical formula.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
- Chemical formula of Prehnite- Ca2Al2Si3O12(OH)
Labradorite and Prehnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Labradorite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.