COMINGS AND GOINGS>>?James Riley has been named CEO of the Gemmological Association of Great Britain. Riley has been a manager for Backes & Strauss and a member of the National Association of Goldsmiths and Gem-A boards.>>?ASHI Diamonds has appointed Jerry Wyatt sales representative and marketing consultant for the Midwest. Wyatt has more than 25 years of experience in the jewelry industry.>>?De Beers Group chairman Nicky Oppenheimer was honored for his work to eliminate conflict diamond trading at the World Diamond Council gala dinner May 14 in Vicenza, Italy.>>?HSN appointed Anne ­Martin-Vachon chief merchandising officer. She was previously chief marketing officer at Nordstrom.>>?Michael R. Kingston has been appointed senior vice president and chief information officer of the ­Neiman Marcus Group. Kingston comes from ANN Inc., the parent company of