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Chinese Scientists Create First-of-Its-Kind 'Hexagonal Diamond' Tougher Than Natural Diamond  Indian Defence ReviewScientists create first-of-its-kind ‘hexagonal diamond’ harder than real thing  YahooLive Science Today: 'Hexagonal' diamonds and fish scale down  Live SciencePure hexagonal diamonds are real and harder than natural diamonds  The Brighter Side of NewsScientists forge crystal to rival diamond  Metal Tech News