CHICAGO - FEBRUARY 8: Graff Diamonds hosted a private reception for supporters of the Northwestern Brain Tumor Institute in association with the Robert H. Lurie Comprehensive Cancer Center of Northwestern University at its Chicago location on Tuesday, February 8, 2011. Guests were treated to champaign and hors d'oeuvres while modeling some of the world's finest custom jewelry. The event was organized by Mary Dempsey in conjunction with the annual Minds Matter Gala. Photo credit: Randy Belice