From Longman Dictionary of Contemporary Englishcostume jewelleryˈcostume ˌjewellery noun [uncountable] DCJcheap jewellery that is often designed to look expensive
Examples from the Corpus
costume jewellery• But costume jewellery had the distinct advantage of not pretending to be anything other than what it was.• She slipped on a figure-hugging black dress and adorned the outfit with a bold selection of costume jewellery. 