Emerald Star Enterprises Limited, a company controlled by Gertler's family trust, was incorporated October 29, 2009 in the British Virgin Islands. December 21, 2009 Emerald Star sold an option to buy the remaining 50% stake of Société Minière de Kabolela et de Kipese SPRL, (a company formed by Melkior Resources Inc and Gécamines that holds the rights to develop the Kabolela cobalt-copper deposit) to Katash-founded mining company Eurasian Natural Resources Corporation (ENRC) who already owned 50%. The other 50% belonged to state-owned Gécamines. In February 2010 Emerald Star Enterprises Limited purchased Gécamines' 50% for $15 million and sold these shares to Eurasian Natural Resources Corporation (ENRC) for $50 million. Emerald Star Enterprises Limited paid $15 million, and sold for $75 million making a 500 percent return.