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The Diamond Has a New Rival: One Made in a Lab

Ulrika D'Haenens-Johansson, a senior research scientist with the the Gemological Institute of America, shows off a synthetic diamond next to a natural diamond underneath a microscope at a research facility, Feb. 8, 2018. The quality of synthetic diamonds has increased to the point where they have made their way into jewelry stores as gems set in rings, necklaces and earrings. (Sam Hodgson/The New York Times)