Purple Garnets from East Africa

Cara Williams1, Bear Williams1, George R. Rossman2, Brendan M. Laurs3, Don Hoover4

1Stone Group Labs, Jefferson City, Missouri, USA
2Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
3San Diego County, CA, USA
4Springfield, Missouri, USA


Attractive purple garnets have recently been produced from East Africa. The more intensely purple garnet from Mozambique has a lower manganese content responsible for less absorption in the 400-440 nm region of the spectrum. Its formula is (Mg1.41Fe1.50Ca 0.06Mn0.13)Al2.02Si2.99O12

Pyrope-almandine garnet from Mozambique

Optical spectrum data file

Revised 21-Jan-2016