The swindling of an English pawnbroker by a man who passed off a white hyacinth stone as a diamond led to the creation a jewellers 'association specializing in verification.
在英國，就曾經有人以白色的風信子石冒充鑽石，騙倒了一家當鋪老闆。自此之後，英國人痛定思痛，才成立了寶石協會，專做鑑定工作。