Mineral: Corundum
Locality: Umba River (Umba Valley), Tanga Region, Tanzania
Dimensions: 3,0 x 2,5 x 5,5 cm

Description: Main crystal size: 5,1 cm Perfect, well terminated, sharp-edged, brilliant green and blue crystal; the color intensity varies along the length MIM number 1068 Photographer: James Elliott (FMI)

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