Our global portfolio demonstrates our persistence in discovery to enable progress for early-staged projects. The Group achieves this through good ideas, judicious investment and the teamwork of skilled people working for shared benefit.

Our vision is to always strive for positive change, persistently using the resources at our disposal to make discoveries and capitalise on them for shared benefit.

Our strategy is to invest for social and financial return where the credibility of participants can be demonstrated and where there is absolute clarity about the nature of the opportunity.

Our people are independent thinkers who are curious by nature. They share a view that the discoveries which lead to lasting progress are often made outside large corporate operating structures. Our devolved approach to managing assets  succeeds because individuals are trusted, supported and encouraged to endeavour and to succeed.

Our culture is not prescribed. But to each member of our team it is immediately obvious that our range of origins and professional backgrounds works to our mutual benefit.

Case Studies

Our history

Jean-Raymond Boulle (born 1950) started his career at the De Beers Diamond Trading Company (“DTC”) where he worked for ten years, in Zaire, Sierra Leone and Antwerp, Belgium. Thereafter he established Boulle Inc. in Dallas, Texas, US.

In 1984 he began exploring for diamonds, first in Minnesota, then in Arkansas.
In 1987 he formed Arkansas Diamond Development Co., to carry out exploration work on the Crater of Diamonds State Park in Arkansas.

Jean-Raymond Boulle is the founder of Diamond Fields Resources Inc, Diamond Fields International Ltd, America Mineral Fields Inc, and Titanium Resources Group Ltd; four publicly traded companies with deposits of nickel, cobalt, copper, zinc, titanium and diamonds.

Jean-Raymond Boulle is also a member of the Board of the Corporate Council on Africa (‘CCA’). He has maintained a longstanding involvement with the CCA since it was established in 1993 to promote business and investment between the United States and the nations of Africa.

Jean-Raymond Boulle was chairman, founder and CEO as well as a major shareholder of Diamond Fields (DFR Gold Inc. TSE:DFR) which commenced trading on the Vancouver Stock Exchange on April 6, 1993 and, in late 1994, discovered nickel, copper and cobalt ore bodies at Voisey’s Bay Mine in Labrador, Canada. The Voisey’s Bay Mine deposit was estimated to contain 141 million tonnes at 1.6% nickel.

Jean-Raymond Boulle was awarded Sierra Leone’s highest order of merit – Commander of the Order of the Rokel – by His Excellency Alhadji Ahmad Tejan, the President of the Republic of Sierra Leone, in recognition of the contribution that Mr Boulle has made to the country and people of Sierra Leone over a 30 year time span.

In 1996 the Voisey’s Bay Nickel Mine Project was purchased by Inco for C$4.3 billion from Diamond Fields Resources Inc whose CEO, founder and major shareholder was Jean-Raymond Boulle.


The Group receives US$47 million investment it its proprietary VDYNE technology


Greenland Anorthosite Mining honoured with the Prospector and Developer of the Year by the Ministry of Mineral Resources


Launch of Boulle SEI Awards for Outstanding Progress in Life and Health Sciences


Jean Boulle joins Board of Corporate Council on Africa


VDYNE obtains $21 million for heart valve replacement technology


The Group partners with SISA to advance Greenland Anorthosite Mining


Tendyne heart valve receives CE Mark approval from the EU


Jean Boulle Medtech’s Tendyne acquired by the Abbott Laboratories


Jean Boulle Medtech’s Tendyne successfully implants Human Heart Mitral Valve


Jean Raymond Boulle awarded Commander of the Order of the Rokel


Adastra Minerals purchased by First Quantum Minerals


Titanium Resources Group listed on the London Stock Exchange AIM


Acquisition of Sierra Rutile Project and Sierra Minerals Bauxite Mine


Voisey’s Bay is sold to Inco


Founded American Mineral Fields (later renamed Adastra Minerals)