Minty Sea Peruvian Opal bracelet . Handcrafted of Hematite & Peruvian Opals. Gold filled clasp and chain. Peruvian opal has long been used to release tension and promote free-flowing ideas. According to metaphysical beliefs, Peruvian opal reduces stress and helps the wearer approach the future with a heightened sense of tranquility. Peruvian opal is also believed to help with issues sleeping.