Welcome to Fremantle Opals Few gemstones can compete with the beauty of a quality opal. Known as Australia's national gemstone and the birthstone of October, every opal is both iconic and unique; no two stones are alike. Established in 1985, Fremantle Opals is an owner-operated business specialising in hand-crafted opal jewellery and fine unset opals, sourced directly from the mines. Just a short stroll from the Fremantle train station, our store is home to an exclusive range of designs, settings and stones, including a selection of rare black opals.