Mount Marion is located 40 kilometers southwest of the Kalgoorlie mine in Western Australia. It is the world's second largest high-quality spodumene mine in production. The project was put into production in February 2017, with an annual output of about 450-480 thousand tons of lithium concentrate.

According to the 2016 resource exploration data, the Marion lithium mine project has a mineral resource of approximately 77.8 million tons, containing 1.37% lithium oxide and 1.09% iron oxide, and is expected to maintain production for approximately 30 years.

The company holds a 50% stake in Mount Marion's parent company RIM.