Labradorite and Andradite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.69-2.72
3.70-4.10
Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
none
Mohs Hardness
6-6.5
6.5-7
Chemical Composition
(Na,Ca)1-2Si3-2O8
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Labradorite and Andradite Chemical Formula
While comparing Labradorite and Andradite 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 Andradite chemical formula.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
- Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Labradorite and Andradite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Labradorite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.