The Rolex Art of Gem-Setting: Whether for diamonds, sapphires, rubies or emeralds, Rolex masters the art of gem-setting. To adorn its timepieces with the most striking gemstones, the brand has its own in-house gemmologists and gem-setters. Gemmologists are responsible for examining and selecting the gemstones received, retaining only those that meet Rolex’s extremely stringent quality criteria. The stones then pass into the hands of the gem-setters, who are tasked with placing and fixing each stone to best reveal its beauty, colour and sparkle.<br /> Rolex has offered gem-set watches throughout its history. In embellishing its watches with precious stones, the brand endows them with an alternative aesthetic, whilst conserving their identity and all their technical features, such as reliability, robustness, and resistance to magnetic fields and to shocks.