Emilio Jewelry Certified 7.15 Carat Muzo No Oil Colombian EmeraldFrom Emilio Jewelry, a well known and respected wholesaler dealer located on New Yorks iconic Fifth Avenue, Featuring a spectacular rectangular emerald cut old mine Muzo vivid green untreated no oil Colombian Emerald center just under 5. 00 carats alone, this is a true investment piece. As 99 percent of emeralds are oil treated, no oils are the Mona Lisas of emeralds. The emerald is vivid green, superbly clean and totally eye clean. Excellent