Web Results

treasuredigger.net/articles/138/1/Treasure-Hunting-For-Turquoise/Page1.html

Feb 18, 2009 ... Turquoise is possibly the most valuable, non-transparent mineral used in jewelry. It has been mined since at least 6000 BC by Egyptians.

hubpages.com/style/top-10-american-southwest-turquoise-mines-a-purely-subjective-list

Feb 19, 2013 ... I love all turquoise! The list of my ten favorite American Southwest turquoise mines have produced some of the most beautiful gems in the world ...

www.goldrushnuggets.com/puoptumiinne.html

Nevada has several public mining sites where you can pay to dig for several varieties of minerals. The most popular and valuable are opals and turquoise.

www.pe.com/2013/12/13/san-bernardino-ancient-turquoise-mines-yielded-modern-fortune

Dec 13, 2013 ... But the local desert had active turquoise mines. Most of them had been worked prehistorically by American Indians, who treasured the mineral.