Gold February futures contracts at MCX opened slightly higher on Thursday at Rs 77,942 per 10 gram, which is up by 0.25% or Rs 195 while silver March futures contracts were trading at Rs 91,261/kg, up by 0.36% or Rs 323.Gold prices surged by Rs 600/10 grams in this week so far while silver prices rose Rs 2,000/kg during this period.