Magnesite

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 7x7 cm.

This sample of magnesite is from Bahia, Brumado, Brazil and measures about 4x9 cm.