This ring by David Yurman is part of their Waves collection for men, but I think it’s a unisex item.

It’s available with black or white diamonds, or with cross hatched sterling silver, all with gold. The wave pattern has a pleasing Japanese design they highlight in their description: Inspired by Japanese wood-block prints and 18th-century samurai swords, David Yurman translates the beauty of ocean waves into wearable art. This could be worn as a wedding band or just because.

As shown with black diamonds, this is priced at USD$2,600.