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The discovery was made by Stephanie Persaud at the Gemological Institute of America in Carlsbad, California. She was grading diamonds for clients when she noticed the cryogenic diamond .

New yorkUnited statesFrance generalPaul johnsonStephanie persaudLisa bissellGeorges halphenOleg kovalchukGemological institute of americaGeological society of americaDevelopment geological enterpriseGemological instituteNew scientistGeological societyRussian matryoshkaDeputy director