Matched turquoise beads

Two gorgeous flat turquoise beads, both measure 40mm x 30mm. I'm not a gemologist but this is where my research on these beautiful beads led me: Royston is a district in Nevada consisting of three turquoise mines: Bunker Hill, Oscar Wehrend, and the main producer, Royal Blue. Royston is known for its beautiful colors ranging from deep green to rich, light blues set off by a heavy brown matrix. The Royston district is still producing some turquoise of high quality. It ranges from a 5-6 in hardness for the high grade. This Turquoise is in very limited supply and the really good high grade is very rare. Two loose beads ready for stringing or mounting. Age unknown. Pictures 2 & 3 are front and back of one stone and pics 4 & 5 are front and back of second stone.