Which gemstone's name is also used for a baseball infield?

Chad Michael Murray plays a modern-day Prince Charming in which 2004 film set in the San Fernando Valley? Which country ruled Chad as a colony until its independence in 1960? Chaim Weizmann was elected the first president of which country in February 1949? Which Swede chaired the board of Sweden's central bank in the 1940s and became UN secretary-general in 1953? Chamonix, France, hosted the first of which Olympic Games in 1924? Will Ferrell played champion ice skater Chazz Michael Michaels in which film? Which Philistine champion came from Gath, according to the first book of Samuel? Which actor played Chance the gardener in "Being There" and died in London in 1980?