Labradorite and Bustamite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partly soluble in HCl.
Durability
Not Available
Not Available
Specific Gravity
2.69-2.72
3.32-3.43
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}
{100} perfect; {110} and {1 1 0} good; {010} poor
Mohs Hardness
6-6.5
5.5-6
Chemical Composition
(Na,Ca)1-2Si3-2O8
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Labradorite and Bustamite Chemical Formula
While comparing Labradorite and Bustamite 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 Bustamite chemical formula.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
- Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Labradorite and Bustamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Labradorite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.