Gringotts won’t mint your gold for a nominal fee: Griphook could have been lying, mistaken, or omitted something. Maybe you bring in a ton of gold and they just laugh at it for not having a special magical signature. Unlikely but possible.
“I wonder who came up with the idea of suspending liquid latinum inside worthless bits of gold. ”
“I wonder who came up with the idea of suspending liquid latinum inside worthless bits of gold. ”