By the time Walker had left the crafting guild, he had been sure that every single master crafter had to sleep. He had personally yelled at them and pushed them out of the guild without another moment. Naturally, he was also very surprised to find that it was the middle of the night.
To be fair though, he had spent hours using the all around appraisal to gain new information about the fused elemental manas causing different unique affinities. Some of them were thigns that already existed, like magma or steam. But since they were in a unique balance of their own right, they became an affinity.
The magma stone gauntlets were a unique existence. They had started to glow and radiate heat causing the owner to fear that the runes were broken or needed repair. That brought them to the crater's guild when they had realized the uniqueness of the properties.