Pathfinder 2024 Precious Stones. Generally ill subtract x amount from a treasure horde and turn them into precious gems. Make the pc's appraise them, failed appraisals can end up with them trying to oversell.
Examples of pathfinder minerals that are geochemical indicators for gold include silver, copper, lead, zinc, cobalt, nickel, arsenic, antimony, tellurium, selenium. Much like coins, gems and art objects are valuable currency worth their full price when sold.