AP - William Ainslie has been collecting rocks and gemstones in Wyoming for a half-century, and news that state geologists have found a deposit of opal in central Wyoming has the 81-year-old rock-shop owner ready to head for the hills.{br}{br}View the Entire Article (http://us.rd.yahoo.com/dailynews/rss/science/*http://story.news.yahoo.com/news?tmpl=story2&u=/ap/20050302/ap_on_sc/opal_find){br}