Almandine and Gahnite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.95-4.30
4.00-4.62
Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Uneven
Cleavage
none
Indistinct parting on [111]
Mohs Hardness
7-7.5
7.5-8
Chemical Composition
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Almandine and Gahnite Chemical Formula
While comparing Almandine and Gahnite 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 Almandine and Gahnite chemical formula.
- Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Almandine and Gahnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Almandine and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.