To me, this proves that crazy stuff can happy to anyone. Jon is as bright and hard-working as anyone I know. He is also entirely trustworthy and honorable in a business that often lacks these qualities. The thief apparently sold one large stone, about 10 ct., to someone in the same building** who then cut it down to 9 ct. and resold it. There would be no reason for a dealer to cut down an already cut stone, since it substantially reduced the value, unless he knew the stone to be stolen and was purposely trying to disguise the stone for resale. Its like a thief robbing your house and selling your TV to your neighbor, who changes the label so you won't recognize it when you come over.
** all of the major diamond dealers in New York seem to work in just 2 buildings on Fifth Avenue.