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