Rare Georgian Era Toadstone Talisman BroochRare Georgian era toadstone talisman brooch with pearl surround. Circa 1800. English in origin. Stones set in gold with original brooch pin and clasp. 1. 25" in length. For centuries, Toadstone was thought to have magical properties and was used for rings and amulets from Medieval times throughout the 18th century. In the presence of poison, a toadstone was believed to sweat, change colour and even heat up. It was believed that a toadstone placed on a