The museum and factory, Göreme Onyx, is an almost obligatory stop. All organized tours are arranged by the Ihlara Valley. Although the so-called "leisure points" (ie, shopping) bothered me, I have to admit that this factory is quite interesting. The black onyx is characteristic of the region of Cappadocia. The hardness determines the most prized variety for jewelry and craft work. Along with the famous turquoise to make the "eyes" of luck. At the factory in Göreme you can see how this stone is crafted and you will have the opportunity to purchase some jewelry. An interesting visit.