GRS 5.42 ct. Colombian Trapiche Emerald & Trillion Cut Diamond Ring in Platinum & 18K GoldABOUT THE ITEM Unapologetically rare and impossibly striking, trapiche emeralds are the rebels of the emerald world. Named after the six spoke cogwheel used to crush sugar cane, these captivating gems form when dark carbon impurities grow within the emeralds hexagonal crystal structure, creating dramatic six pointed stars that seem almost too perfect to be natural. First documented in 1879 by French mineralogist Emile Bertrand, trapiche emeralds