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A 12-carat "Blue Moon Diamond" is pictured while on display at the Natural History Museum of Los Angeles County in Los Angeles

Rare flawless ‘Blue Moon Diamond’ goes on display in Los Angeles

A 12-carat ‘Blue Moon Diamond’ is pictured while on display at the Natural History Museum of Los Angeles County in Los Angeles, California September 12, 2014. (Reuters) – A rare blue flawless 12-carat diamond, one of the world’s rarest gems, was the newest attraction at the Natural History Museum in Los Angeles on Friday, adding

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