What others considered rare and valuable could be easily obtained from Inferno Monk.
Inferno Monk's magic treasure, the crescent edge shovel destroyed itself to break Yan Shenjun's formation, which allowed them to escape. The fire crystal-like Buddha beads that previously hung around Inferno Monk's neck were gone too.
Lin Jin later learned that to perform the Inferno Sprint, Inferno Monk had sacrificed the string of Buddha beads he had been nourishing for three hundred years.
It was due to this that Inferno Monk ended up in such a battered state after he performed the escaping spell. Had Lin Jin not barged into that realm, Inferno Monk wouldn't have realized the realm was flawed. He could very well have died in Yan Shenjun's hands.
The Buddha beads were made of the nine sun quartz that Lin Jin was looking for.