April 20 (Reuters) - Canada’s main stock index slipped on Tuesday as elevated U.S. Treasury yields weighed on risk assets and gold prices, although a jump in crude prices limited losses. At 9:33 a.m. ET (1333 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was down 118.61 points, or 0.62%, at 19,085.81. (Reporting by Shashank Nayar in Bengaluru; Editing by Amy Caren Daniel)