Forging

Mercury continued weighing the ingots in his hand for a bit until he finally chose an ingot from the stack a few minutes later, he tapped it a few times with his finger, he could feel some 'lines' inside the ingots, and this one had the most straight and neat 'lines' so, therefore, he chose this particular ingot

"This one"

Marie snapped out of her daze and nodded before she gestured for Mercury to hand her the ingot which he did, she weighed it in her hand for a bit before she tapped it a few times and nodded

"Good choice, this is at least a grade 8"

Mercury tilted his head to the side slightly as he asked

"Grade 8?"

Marie showed a smile and explained

"It's the quality of the ingot, it goes from bad at grade 1 to excellent at grade 10"

"I see… Well then let's go with that one then"

"Sure"