How does selling gems work?
Arte only offers you money for a gem once you have found it. As soon as you have added it to your collection, you no longer can sell it back to him. But remember, once you earn the crown you can sell the crown itself! Arte rarely ever makes the same offer twice, except for the Gem of the Day. His offers are based both on your collection and his own need for particular types of gems. Unfortunately, you cannot sell gems to anyone but Arte. If you sell a collection box, you are not selling the gems inside. If you buy more than one collection box, you will only see the same collection of gems inside.
