The Wizard of Odd Collection (TCB version of the Wizard of Oz) Our Wicked Witch Earring Kit was designed using a variety of Swarovski Crystals to create the unique look of these earrings. Findings are Sterling Silver. Includes all materials needed to create 1 finished earring kit The Wizard of Odd Collection (TCB version of the Wizard of Oz) Our Wicked Witch Earring Kit was designed using a variety of Swarovski Crystals to create the unique look of these earrings. Findings are Sterling Silver. Includes all materials needed to create 1 finished earring kit