KANSAS CITY, Mo., May 4, 2012 /PRNewswire/ -- Javier Castellano, rider of Gemologist, continues to be a favored pick and strong contender for the 2012 Kentucky Derby on May 5, 2012. Castellano recently partnered with Helzberg Diamonds to drive awareness of featured products in advance of the 138th Run for the Roses. "We are genuinely proud of Javier and Gemologist's progress and know the great strides they have made is a result of their dedication and teamwork," said Beryl Raff, chairman and CEO of Helzberg Diamonds. "We couldn't be more thrilled to partner with them and we're looking forward to seeing their hard work pay off at the Derby." Heading into the Derby, Castellano and Gemologist have won four straight races, including the Grade 1Wood Memorial. Castellano is currently the leading jockey in major wins and earnings. He will be riding Gemologist in an effort to join other undefeated Kentucky Derby winners. A total of seven horses have won the Derby undefeated and Gemologist will be the 23rd to attempt since 1900. "Gemologist and I have been training for this opportunity all year and our race will be a true testament of our hard work," Javier Castellano said. "Winning the Kentucky Derby would be an absolute honor, especially since few have done it undefeated." Gemologist arrived at Churchill Downs in late morning on May 1st and will continue preparations for the Kentucky Derby with Castellano this week. About Helzberg DiamondsHelzberg Diamonds®, a retail and online jewelry store focused on customer service, was founded in 1915 and has more than 230 stores nationwide, featuring a wide selection of fine jewelry, including diamond engagement rings and wedding rings, precious gems and watches. Helzberg Diamonds takes pride in its history of offering exceptional value, exclusive designs and timeless jewelry. Helzberg Diamonds is based in North Kansas City, Mo., and is part of the Berkshire Hathaway, Inc. (NYSE symbol BRK/B) family of companies. For the locations nearest you, call 1-800-HELZBERG (800-435-9237) or visit http://www.helzberg.com. About Javier CastellanoJavier Castellano, rider of Gemologist (born October 23, 1977 in Maracaibo, Zulia State, Venezuela) is the son of a former jockey. He got his start in his native Venezuela in 1996 and moved to the United States in 1997. In 2004 he was the rider for Ghostzapper, the winner of Breeders' Cup Classic and the 2004 Eclipse Award for Horse of the Year. In 2006, Javier rode Bernardini, earning his first Triple Crown race victory in the G1 Preakness Stakes. Bernardini went on to be named champion 3-year-old of 2006 with additional wins in the Jockey Club Gold Cup, Withers, Jim Dandy Stakes and Travers Stakes.