Labradorite and Rubellite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.69-2.72
3.01-3.06
Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Not Available
Mohs Hardness
6-6.5
7-7.5
Chemical Composition
(Na,Ca)1-2Si3-2O8
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Labradorite and Rubellite Chemical Formula
While comparing Labradorite and Rubellite 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 Rubellite chemical formula.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
- Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Labradorite and Rubellite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Labradorite and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.