Adastra Minerals Inc (formerly America Mineral Fields Inc), was a London-based mining company with notable operations in central Africa (Angola, Democratic Republic of Congo, and Zambia), particularly in copper, cobalt and zinc exploration. Adastra's properties and concessions were acquired in 2006 by First Quantum Minerals for $245m in cash and stock, outpacing a counter-offer by Mwana Africa plc. Founder Jean-Raymond Boulle and top UK insurer Prudential plc had owned 10% and 14% stakes in Adastra, respectively.
In the mid-1990s, the company became known for developing highly prospective copper and cobalt mines in Zaire during a civil war.