Cufflinks evolved from the “cuff strings” of the early 1500s. Today, most dress shirts have buttons, but the most formal of men’s shirts still require a pair of cufflinks.

A pair of luxury cufflinks created by Atelier Yozu are some of the most expensive cufflinks in the world. Yozu specializes in custom cufflinks made from a variety of luxury materials. This particular pair incorporates 18k yellow gold, 60 round diamonds (.01 carats each) and a short bar of mammoth ivory. Along with several other pairs of cufflinks created by Yozu, the Yozu Mammoth Ivory & Two Rows Diamonds Cufflinks are offered by Pianki, a dealer in “World Class Luxury Gifts.” They’re priced at $9,195.

Of course, a custom pair of cufflinks by Yozu will no doubt be more expensive. Yozu’s custom cufflinks can be made with 18k white or yellow gold or platinum and can be engraved with guilloche enameling.