Turquoise, Bishop Mine, Lynch Station, James River-Roanoke River Manganese District, Campbell Co., Virginia, USA, thumbnail, 1.7 x 1.3 x 0.8 cm, Superlative, sparkly, best color, sky-blue turquoise microcrystals richly cover matrix on this stunning thumbnail specimen from the locality with the best turquoise crystals in the world - the Bishop Mine at Lynch Station, Virginia., For sale from The Arkenstone, www.iRocks.com. For more details on this piece and others, visit…