Topaz Mining Equipments
Open pit mining method has many advantages such as increased safety, higher production rates, more flexibility, lower cost, less operational risk, etc., so normally it considered as preferred .Topaz is mined in Australia, Namibia, Nigeria, Russia, Pakistan, Brazil, California, New Hampshire and Utah. The gem is mined in what is called surface mining. It is also mined in underground mines. There are five different types of surface mining. Strip mining, open pit mining, dredging, highwall mining and mountaintop removal mining.