This alexandrite crystal is from the Carnaiba Mining District in Pindobacu, Campo Formoso ultra mafic complex, Bahia, Brazil. This area contains extensive deposits that contain twenty different minerals including chrysoberyl and alexandrite. Chrysoberyl is a beryllium oxide that contains the elements Be Al and O. The green chromium bearing variety is called alexandrite. This is a dark green complex crystal that has terminated natural surfaces on all sides. It measures 10 x 8 x 4 mm.