Shapes, colors, contrasts : them minerals of the world often contain unsuspected beauties. After a journey of several years in the heart of the stones, the gemologist Bruno Cupillard has decided to immortalize the most beautiful of them thanks to the photography. A work halfway between art and inventory to better progress in the bowels of these splendours and thus know some keys to the identification of minerals. The opportunity to learn more about the composition, optical properties and growth of minerals but also about their maintenance. Jasper, gypsumBrazilian agate: go in search of the hidden treasures of the world mineral.