Not just Ling Feng and his group, but many people were flocking towards the stall selling the raw stones.
Although gambling on stones relies heavily on luck, it's not absolutely so; there's indeed a deep knowledge to it.
Seasoned veterans who have been immersed in this field for years can judge the origin of the raw stones just by their color and patterns on the surface, but whether or not there is jade inside the stone is a bit harder to say.
Ling Feng knew at a glance that the person who bought the raw stone would be in for a surprise, because he noticed something the size of an egg inside the stone that was emitting strands of Spiritual Energy.
As for the others, they couldn't predict the outcome at all, so all had faces full of anticipation.
Because there were many stalls, quite a few Stone-cutting Machines were prepared, and a crowd followed the buyer to one of them, babbling something.