Gunderson's Jewelers on Instagram: "This is one of @‌Rolex's many sunray-finish dials. Its color results from a technique known as physical vapor deposition, or PVD. In a controlled environment, metallic particles are released onto the dial in successive layers. It is the interplay between the thickness of the coating and the nature of the metal that allows light to reveal a unique hue. The combinations are endless. Therefore, so are the exclusive chromatic nuances the brand can create. The proc