Umbalite

Umbalite is a light pink to purple Pyrope, originally from the Umba River, Tanzania.

Umbalite is used in the jewellery. It is durable and resistant to everyday wear and tear.
General Information
A variety or type of:Pyrope-Spessartine, which is a variety of Garnet Group
Chemical Formula
Mg
 
3
Al
 
2
(SiO
 
4
)
 
3
-Mn
2+
3
Al
 
2
(SiO
 
4
)
 
3
Gemdat.org, Management Team (2012)
Photos of natural/un-cut material from mindat.org
Physical Properties of Umbalite
Mohs Hardness7 to 7.5
Gemdat.org, Management Team (2012)
Specific Gravity3.62 to 4.33
Gemdat.org, Management Team (2012)
TenacityBrittle
Gemdat.org, Management Team (2012)
Cleavage QualityNone
Gemdat.org, Management Team (2012)
FractureUneven,Conchoidal
Gemdat.org, Management Team (2012)
Optical Properties of Umbalite
Refractive Index1.730 to 1.820
Gemdat.org, Management Team (2012)
Optical CharacterIsotropic
Gemdat.org, Management Team (2012)
Dispersion0.022 to 0.027
Gemdat.org, Management Team (2012)
Colour
Colour (General)Light pink to purple
Gemdat.org, Management Team (2012)
TransparencyTransparent
Gemdat.org, Management Team (2012)
LustreVitreous
Gemdat.org, Management Team (2012)
Crystallography of Umbalite
Crystal SystemIsometric
Gemdat.org, Management Team (2012)
Further Information
Mineral information:Umbalite information at mindat.org
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