Most of the world's precious opal is mined in Australia, and the Romans counted it among the most prized of all gems. Its play of colour shifts with every movement of light. Tourmaline, October's second birthstone, takes its name from the Sinhalese turmali, a word once used for mixed gemstones. October's birthstone is shared by Libra and Scorpio. Discover October birthstone jewellery set with opal.

Choose your month: The Florence Birthstone Charm, Ear Charm, Necklace and Bracelet, in 9K or 14K solid gold, can be set with tourmaline for October.