Oyster Perpetual 28 Oyster, 28 mm, yellow gold

From the retailer listing

Green stone dial On the lacquer dial of the Oyster Perpetual 28, three of the hour markers – those at 3, 6 and 9 o’clock – are in natural stone, a first for Rolex. The heliotrope presents a variety of green hues and features an ogive cut on its upper surface, which highlights its individual structure and colour while preventing the slightest reflection. 18 ct yellow gold By operating its own exclusive foundry, Rolex has the unrivalled ability to cast the highest quality 18 ct gold alloys. According to the proportion of silver, copper, platinum or palladium added, different types of 18 ct gold are obtained: yellow, pink or white. They are made with only the purest metals and meticulously inspected in an in-house laboratory with state-of-the-art equipment, before the gold is formed and shaped with the same painstaking attention to quality. Rolex's commitment to excellence begins at the sou