18kt rose gold polished finish prong-set oval-cut laboratory-grown opals prong-set pear-cut laboratory-grown amethysts prong-set trillion-cut laboratory-grown pink rubies blue sapphire pavé-set laboratory-grown diamonds and rubies butterfly fastening for pierced ears These earrings come as a pair. Hallmarked in the United Kingdom at the London Assay Office. Normal everyday use and external agents may reduce the lustre of gemstones and gold surfaces. To maintain, use specific, non-abrasive products specially meant for cleaning jewellery.