Patrick VOILLOT, pharmacist in Paris, is a graduate in Gemology. A specialist in precious and fine stones, in order to satisfy his passion, carries out expeditions all over the four Continents, reaching lands known as " impossible " and inaccessible. Author of several works (Gallimard, Prés aux Clercs, Criterion, Atlas, Hazan, Privat, Hermé). Performance director and author of a TV series " In Search of Precious Stones" published on RFO, France 3, France 5, formed by 12 fifty-two minute documentaries.