The gem of WLK is called "Longan Stone". I don't know how to translate the national costume. It needs a "jewel badge" in exchange. Jewelry majors can get a daily task in Dalaran Jewelry Store, and specify a strange thing for you to kill and get the task items. Then, some small green gems are synthesized into task items. After completing this daily task, you can get a "Jewelry Badge". By the way, all WLK's highest grade jewelry drawings (namely purple gems) must be exchanged with this jewelry badge, including the drawings of Dragon Pupil Stone. The price is 2 badges for dragon pupil stone painting and 4 badges for other purple gems.
Let's talk about the dragon pupil stone.
Dragon pupil stone only provides a single attribute, strength, endurance, intelligence, spirit, agility, attack strength, spell damage, proficiency/evasion/parry/haste level, hit crit and so on ... there are no mixed attributes, such as TBC's 6 damage, 6 haste or 5 strength, 7 endurance.
Dragon pupil stone is not bound and can be traded. At present, the market price of table clothes is about 100G/ piece. However, cut gems can only be used by jewelry professionals. You can be equipped with up to three dragon pupil stones at the same time. If you have two or even three sets of equipment, and the use occasions are completely different, such as a set of defense and a set of soldiers' DPS, you can use six dragon pupil stones.
Above, is there a problem?