This corundum crystal of ± 1.2 x 1 cm, shows shades of red (ruby) and purple (sapphire). According to the light they show different colorations, hence the polychrome adjective. It shows well defined faces and edges, with internal and external growth striae. Translucent and shiny. The matrix is micaceous shale, in total the measurement is ± 7 x 3.5 cm, mounted on a 4 x 4 cm methacrylate base.
Amboarohy, Zazafotsy, Ihosy Finarantsoa-Madagascar
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