Gahnite and Umbalite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.00-4.62
3.62-4.33
Fracture
Conchoidal, Uneven
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
Cleavage
Indistinct parting on [111]
Not Available
Mohs Hardness
7.5-8
7-7.5
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Gahnite and Umbalite Chemical Formula
While comparing Gahnite and Umbalite 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 Gahnite and Umbalite chemical formula.
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Gahnite and Umbalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gahnite and Umbalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Umbalite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.62-4.33 whereas that of Umbalite is 3.62-4.33.