When Tiffany launched its keys collection a few years ago, it was extremely popular. The key motif has since been made available in gold, with or without diamonds, in silver, and in silver with enamel. This one features a heart enamelled in Tiffany robin’s egg blue; should you need to show someone some heart for Valentine’s Day this year, it is USD$150; the 16 inch chain is an additional USD$50.