Feb 9, 2017 Highgrade gold ore from a quartz vein near Alma, Colorado. The appearance is typical of very good goldquartz ore.
High Grade Gold Ore From A Quartz Vein Near Alma Colorado. Gold vein stockwork in limonite (Gold Flake Vein, . 25/10/2012· Gold vein stockwork in limonite from Colorado, USA. (public display, Denver Museum of Nature Science, Denver, Colorado) The Colorado rock shown above, nicknamed "Tom's Baby", is an extremely highgrade gold ore.