Parisite is a mineral which contains lanthanum and cerium as well as calcium and flourine. It has the general composition Ca(Ce,La)₂Ca(CO₃)₃F₂. The origin of this sample is Muzo, Colombia. The sample measures about 7 cm across. The sample is on display in the Smithsonian Museum of Natural History.

Another mineral containing lanthanum and cerium is bastnaesite, (Ce,La)CO₃. This sample is from Trimouns talc mine, Luzenac, Ariege, France. Its size is about 3.5x3.5 cm.

Hibonite is a mineral which contains cerium as well as calcium and other metals. It has the general composition (Ca,Ce)(Al, Ti,Mg)₁₂O₁₉ . The origin of this sample is Eshiva, Madagascar. The sample measures about 2.5x2.5 cm.