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Increasing amounts of synthetic stones could upend a market that depends on a perception of relative scarcity.
Lab-grown diamonds are marketed as an ethical alternative to natural stones, but mining companies argue they’re no match for the real thing. Here’s a look at how synthetic gems are made—and how they compare to those culled from the ground. (Video/Illustration: Heather Seidel/The Wall Street Journal)
Watch the video at http://www.wsj.com/articles/de-beers-tries-to-counter-a-growing-threat-man-made-diamonds-1478434763