The Verma Group answers hundreds of calls every day about designer diamond jewelry. Whether the question is about a Tiffany set diamond engagement ring or a Harry Winston diamond necklace, we try to answer all questions on the spot. One of the big pro’s of owning designer jewelry is that they always fetch high premiums in international jewelry markets. The problem with designer jewelry though, is it is a large investment at the time of purchase! Items with designer hallmarks and stamps will naturally have more demand in the market.