A survey conducted in the U.S. by New York based - The Luxury Institute, revealed names of Graff Diamonds and Tiffany & Co. as being ‘stand-out brands’ for the most affluent shoppers in the U.S., reports say. The survey was conducted online in April this year, with 500 consumers who had a net worth of at least $5 million.

Graff Diamonds featured as the most prestigious jewelry brand with a score of 7.98 out of 10, in reference to its products, client experience, reputation and whether the consumers would consider returning to shop at Graff again, reports say.

The survey also collected data based on gender segmentation. The ultra-wealthy women segment ranked Tiffany as the most preferred jewellery brand, with David Yurman and Cartier following next. This segment also noted these brands to be the top three in reference to ‘preferred salesman’. More than half of this female segment was impressed with handwritten thank-you notes, reports say.