St George Mining (ASX:SGQ) is developing proprietary technology to separate cerium and lanthanum from the rare earths mineralization from the Araxa project in Brazil, according to a Tuesday Australian bourse filing.

The separated cerium will then be available for manufacture of a commercial cerium product, the filing said. The company will collaborate with Nanum Nanotecnologia on the commercialization of the cerium component in the large rare earths resource.

The company acquired land at Araxa for the potential construction of new facilities, per the filing.

St George Mining's shares rose nearly 2% in recent trading on Tuesday.