Markey No. 3, Markey Mine, Red Canyon Mining District, San Juan County, Utah, USA
Rich vein of blue chalcanthite in brown sandstone. 5.2 x 7.2 cm. Collected by David Shannon in Nov. 1986. Michael Shaw Collection.
© J.Ralph
Bright blue crystalline chalcanthite, with some crude crystals on matrix. Purchased from David Shannon in 1983.
© Andrew Hodgson