(Updates prices, sectors) June 14 (Reuters) - Canada’s main stock index edged lower on Monday, as losses in mining stocks and dismal domestic manufacturing data overshadowed gains in energy stocks. * The materials sector, which includes precious and base metals miners and fertilizer companies, lost 0.7% as gold futures fell 1.6% to $1,848.2 an ounce. * Canadian factory sales slipped by 2.1% in April from March on lower sales of transportation equipment, as well as subdued petroleum and coal products sector, Statistics Canada said. * At 9:43 a.m. ET (13:43 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was down 14.52 points, or 0.07%, at 20,123.83. * The energy sector climbed 1.4% as U.S. crude prices were up 1% a barrel, while Brent crude rose 0.9%. * Financials slipped 0.3%, while industrials fell 0.1%. * On the TSX, 120 issues were higher, while 107 issues declined for a 1.12-to-1 ratio favouring gainers, with a trading volume of 22.35 million shares. * TSX’s top gainers were paper and packaging company Cascades Inc and IT firm Kinaxis Inc, jumping 4.1% and 4.0%, respectively. * Biggest decliners were uranium producers Nexgen Energy Ltd , down 5.9%, followed by Cameco Corp falling 5.5%. * The most heavily traded shares by volume were Canadian Natural Resources Limited, BCE Inc, and Hut 8 Mining Corp * Twenty-two stocks hit fresh 52-week highs on the TSX, while there were no new lows. * Across all Canadian issues, there were 95 new 52-week highs and four new lows, with total volume of 43.57 million shares. (Reporting by Amal S in Bengaluru; Editing by Rashmi Aich) Our Standards: The Thomson Reuters Trust Principles.