Matthieu was born and grew up in Paris, France. His interest in metalsmithing started at 19 when he moved to Taos New-Mexico where he studied Navajo, Zuni and Hopi techniques and traditions, specially Navajo stamp work. After this he moved to Mali, where he studied Touareg, Fulani and other techniques that have been passed from one generation to another in the apprenticeship tradition. These techniques are slowly getting lost. Matthieu was moved to preserve them by writing a book called "Legacy, jewelry techniques of West Africa". He developed a style of metalsmithing using stamps that he calls Stampclastic. Stamping holds a special place in my heart; it is a universal technique that can be done anywhere. Stamps can be made out of recycled pieces of steel, old chisel or such.
“Stampclastic” as I call it is a tribute to all the jewelers around the world who transform any old piece of steel into tools or any piece of metal into beautiful jewelry. In 2014 Tim McCreight and I created the Toolbox initiative, a non profit organization that helps jewelers in West Africa mostly by giving donated tools.