Willemite and Umbalite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.89-4.18
3.62-4.33
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
Cleavage
{0001}, {11 2 0} imperfect
Not Available
Chemical Composition
Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Willemite and Umbalite Chemical Formula
While comparing Willemite 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 Willemite and Umbalite chemical formula.
- Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Willemite and Umbalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Willemite and Umbalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Umbalite Optical Properties during the identification of gemstone. Specific gravity of Willemite is 3.62-4.33 whereas that of Umbalite is 3.62-4.33.