May 7 (Reuters) - Canada’s main stock index opened higher on Friday as material stocks rose tracking gold prices, which were set for their best week in six months on lower dollar and Treasury yields. * At 14:33 a.m. ET (13:33 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 33.44 points, or 0.17%, at 19,324.42. (Reporting by Shivani Kumaresan in Bengaluru; Editing by Shailesh Kuber) Our Standards: The Thomson Reuters Trust Principles.