Gold-plated tuxedo studs are an easy way to punch up a formal shirt, and this set has cufflinks to match. Codis Maya is named after the Mayans, who worshiped precious metals. While the London-based artisans behind CM don't go quite that far, they're pretty dang skilled. Gem-setting, hand- and guilloche-engraving, fired enamel — they can do it all.