They are privately owned, so to visit them you need to contact a tour operator.

These mines are known for the purity of their crystals and have two varieties: common opal and noble opal with beautiful colors.

The mines are open-pit and are worked in a rustic manner with a homemade hammer. Opals are extracted from the stones where they are embedded, although you can also find small pieces on the ground.

You can also visit the workshops to see how each piece is cut and polished.