Piat . GEMGENEVE, the new exhibition dedicated to Jewelry Discover the collections of the innovative jewelers present at the Gemgeneve show with Emmanuel Tarpin, Fabio Salini, the Piat house, Sandra Cronona, Thomas Faerber. We fell for the jewels designed by colourist Isabelle Langlois… Meet Isabelle Langlois, a French jewelry designer with a unique talent for combining and bringing out colored stones.