SAFE
The Ultrasonic Jewellery Cleaner can be used to clean jewellery made from gold, silver, platinum, gold-plated, gold-filled or vermeil, including rings, earrings, bracelets, necklaces and anklets. Jewellery with sapphire gemstones and natural or lab-grown diamonds are also suitable for use with the Ultrasonic Jewellery Cleaner.
NOT SAFE
Any jewellery with gemstones that rank 8 or below on the MOHs Hardness Scale should NOT be used with the Ultrasonic Jewellery Cleaner, as they are at a high risk of damage with this device. This includes topaz, pearls, opals, turquoise and emeralds.
Additionally, gemstones that have been coated with oil, wax or plastic, or those that have been heat-treated, are not compatible with this device.