* TSX up 0.59 percent at 9,951.99

* Energy up 1.11 percent as oil gains

* Materials rise 0.40 percent (Adds details, quote)

By Nina Lex

TORONTO, July 14 (Reuters) - Toronto's main stock index rose on Tuesday morning as a rally in oil and commodity prices helped push the resource-heavy index to its highest level in a week.

The TSX index's energy sector led the gain, up 1.11 percent, as the price of oil rose to around $61 a barrel. Suncor Energy (SU.TO: Quote, Profile, Research) shares were up 1.7 percent at C$37.76, Petro-Canada (PCA.TO: Quote, Profile, Research) rose 1.71 percent to C$40.43, and Imperial Oil (IMO.TO: Quote, Profile, Research) was up 0.87 percent at C$41.74.

Oil company Canadian Natural Resources (CNQ.TO: Quote, Profile, Research) was the index's biggest heavyweight advancer, up 1.22 percent at C$57.87.

The index's mining-heavy materials sector rose 0.40 percent. Barrick Gold was up 1.03 percent at C$37.25 and Teck Resources (TCKb.TO: Quote, Profile, Research) was up 1.42 percent at C$19.29.

At 10:13 a.m. (1413 GMT), the S&P/TSX composite index .GSPTSE was up 58.53 points, or 0.59 percent, at 9,951.99. Five of its 10 main groups were higher.