THE RAYY rings are 18k gold and made to order with the letters/word of your choice:
From RAYFORM technologies:
ORDER HERE THE RAYY ring
THE RAYY Fine Jewelry: computational caustic projection from the polished surface of a ring of white gold. Here the image of the word LIGHT is formed via a reflecting surface in a new process that utilizes the physics behind how light is concentrated into caustics, such as the bright interesting curves of light seen at the bottom of a pool. There are no letters engraved in the polished surface- instead the face of @therayy ring has a surface of slight but precisely calculated and constructed curves, designed to project a word chosen by the wearer when lit by a simple light source like the sun or a smartphone flash. This is not a hologram, but instead a new proprietary light redirection technology by the company RAYFORM.