RAPAPORT… Mark Gershburg stepped down as director of the U.S.
Kimberley Process Authority (USKPA) to focus on his company, Gemological
Science International, of which he is the founder and chief executive officer.
New York-based USKPA administers and controls the use of
U.S. Kimberley Process certificates for the export of rough diamonds from the country.
Gershburg said growth of GSI, whi…