When asked to create a simplified, affordable version of diamonds for women by Tiffany, Elsa Peretti stationed 12 small diamonds set in gold bezels at uneven lengths on a 36-inch chain. Her first delicate, versatile jewel, in seeing the long chains with small diamonds an inch or so apart, her friend, the legendary fashion designer Halston, ingeniously dubbed them ‘Diamonds by the Yard’, and the name stuck. Peretti varied the style by adding different sizes of diamonds and lengths of chain, and by doing so made diamonds wearable and accessible. The collection has gone from strength to strength, and now includes earrings, rings, pendants, lariats, necklaces and bracelets in silver, platinum, rose gold and yellow gold. From £530 for a pendant necklace in yellow gold.