Umbalite and Grandidierite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.62-4.33
2.85-3.00
Fracture
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Cleavage
Not Available
Perfect
Chemical Composition
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Umbalite and Grandidierite Chemical Formula
While comparing Umbalite and Grandidierite 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 Umbalite and Grandidierite chemical formula.
- Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
- Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Umbalite and Grandidierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Umbalite and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Umbalite and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Umbalite is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.