Amethysts for Girls bracelet with sterling silver heart clasp, from Astley Clarke Gemstones. This pretty gemstone bracelet is hand strung and features a 6 inch strand of smooth round amethyst finished with a secure sterling silver heart clasp. A delightful gift for any girl, this amethyst bracelet is a perfect introduction to coloured gemstones and a worthy step to laying foundations for any jewellery box. Astley Clarke Gemstones is a selection of our favourite stones for the season sourced from all over world and designed and developed by the Astley Clarke creative design team.