Appraise

You hold a coin in your hand, and hold that hand over an object while speaking the incantation. Upon the ritual's completion, you learn the approximate worth of the item in question in the currency of your choice taking into account its potential uses, the labor put into collecting or making it, the rarity of the object, and its quality. 

The type of coin affects the length of the length of the ritual to cast the spell:

• a copper coin requires a 10 minute ritual
• a silver coin requires a 5 minute ritual
• a gold coin requires a 3 minute ritual
• a platinum coin requires a 1 minute ritual