The nuance of 777 Gems Respin is that there are no full-fledged free spins here. Instead, the concept of a re-spin is used – a single free spin, which affects only one reel, while all the others remain untouched. It’s not hard to guess that this option is used when you’re just one step away from getting a winning combination. In this slot, the respin is triggered if six identical symbols appear in the form of two vertical lines (no win) adjacent to each other.