Don't just settle for 1 crystal in each ear when you can have 2! These double stud earrings each feature the beautiful blue of a tanzanite crystal sitting alongside a contrasting clear crystal, for double the sparkle and impact. The crystal designs measure 0.4cm x 0.9cm x 0.3cm, whilst the front to back distance of each earring is 1.2cm. Weighing just over half a gram, these earrings are supplied with butterfly backs.