Lind pulled his wagon up what was clearly a high class neighborhood. The street had always been clean but he noticed that grade 4 to 5 formations were replaced strictly with grade 6 at a certain point.
The materials shifted in a similar fashion but then he began to notice an increase in grade 7 materials!
He saw true fire silver used in decorations where it was a supremely precious material in the 1st layer. He, himself, used it to make weapons for those that favored fire Arts or even defensive Arts against fire.
True fire ores were extremely hard to refine but Forging was far easier. Thus Forgers had become very sought after for grade 7 materials like that but the precious metal that seemed to be so difficult to find previously was now used as simple decoration!