Gold February futures contracts at MCX opened slightly higher on Friday at Rs 78,311/10 gram, which is up by 0.27% or Rs 207 while silver March futures contracts inched higher to open at Rs 92,160/kg, up by nearly 0.5% or Rs 449.Gold prices increased by Rs 1,560/10 grams in January so far while silver prices fell by Rs 4,930/kg in the same period.