Literal Diamond Ring

"Jony Ive's latest design is the ultimate diamond ring – made only of diamond":

Creating a ring-shaped diamond is no small feat; the diamond block will be faceted with several thousand facets, some of which are as small as several hundred micrometers. The interior ring will be cylindrically cut out for the desired smoothness using a micrometer thick water jet inside which a laser beam is cast. The finished ring will have between 2000-3000 facets which has never been seen before on a single piece.