rhodium vermeil prong pear-cut laboratory-grown pink sapphire totalling 49.3 carats prong pear-cut laboratory-grown orange sapphire totalling 32.5 carats prong baguette-cut white diamonds totalling 6.9 carats infinity design 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.