Sporting Treasures Billy Jack Designs outstanding Number 8 Mine (Closed in 1961) turquoise stones paired with sterling silver beads. Known for its pale blue color with brown matrix, the Number 8 mine is one of the most collectible turquoise types and available only on a limited basis. The stones were held by some rock collector for 60 years. Old and beautiful, strung on an imported Italian sterling chain. Price includes shipping!