MgCO₃

Magnesite is a carbonate mineral of magnesium. It has the composition MgCO₃. The origin of this sample is Oberdorf, Styria, Austria. It is on display in the Smithsonian Museum of Natural History. The sample measures about 15x20 cm.

The sample at right is magnesite with quartz from Bahia, Brumado, Brazil. It measures about 10x30 cm.

These magnesite gems measure 93.5 and 390 carats and are from Pedra Preta mine, Brumado, Bahia, Brazil.

This magnesite sample is about 15 cm across and is from Brumado, Bahia, Brazil.