Show I Found in Colorado Denver Colo Cob Feb Fob 25 Pitch blende tram front which is made is found in several sections of Colorado in con considerable considerable Quantities It is an ore that thatIs is s mined the same as other minerals Boulder county in the northeastern portion of the state and Montezuma I county count In the southwestern part have I mines producing pitch blende blonde that have been working for several years ears The mineral Is a yellowish substance that greatly resembles sulphur In appear J anne when ground up i |