The Commerce Commission has told jewellers they must ensure customers know that jewellery made from white gold or silver may be coated with another metal and could need regular replating.
Rhodium is a metal that is frequently used to enhance the colour and shine of white gold. Replacing it costs $50 to $60.
The Disputes Tribunal found that a man from Auckland should have been told about the coating on an engagement ring he bought, and now the Commerce Commission says that should apply in other cases.
The Jewellers Association is unhappy about having to give such a warning and plans to appeal against the tribunal finding.
Association chairman Mark Bennett says it is the equivalent of car yards having to tell customers there is metal under a vehicle's paintwork.
