The income from jewelry is a gem dedicated to jewelry, and the illustrations of this gem need to be exchanged with coins given by jewelry every day. Each illustration needs two coins, and the NPC who exchanges special drawings for jewelry is next to the jewelry processing trainer in Dalaran. Jewelry-specific gems are 60% higher than ordinary gems, but only three kinds of jewelry-specific gems can exist in the whole equipment at the same time. For example, if you have three gems on your belt and one on your wristband, you can't wear both pieces of equipment at the same time.