A tennis bracelet is a stylish and elegant wrist ornament with fine links and a symmetrical pattern of diamonds or other gemstones. A tennis bracelet is also called an eternity bracelet. Most diamond tennis bracelets are made of white gold because this precious metal shows off the colourless diamonds to their best advantage. If you attach more importance to an exclusive tennis bracelet, you can opt for timeless and classic yellow gold or red gold, the more playful version.