Meteorite Engagement Ring Have You Ever Promised Moon and Stars? Handcrafted jewelry made in France, the worldwide reputed country for the traditional luxury products as jewelry (Cartier, Boucheron, Mauboussin, etc.) -Gold: 750/1000 (18 karat yellow and white gold), concept and design by Luc Labenne. -Every piece is marked with a lozenge-shaped “poinçon de Maître” (master's hallmark), which guarantees its authenticity. -And also marked with an “eagle’s head” (named "Poinçon d'Etat" in French) which guarantees the metal to be 18 Karat gold.