Scales having these measuring increments are usually available wherever gold mining equipment is sold. This troy system is mostcommonly used by miners in the field and when gold is sold on the open market. A troy pound is equal to .3732 kilograms, whereas a standard pound (avoirdupois) is .
A photograph of the Cripple Creek Victor Mining Company's openpit gold operation in Cripple Creek, Colorado, showing a fairly typical heap leach gold operation .....55 Figure 8. A photograph of an electric rope shovel of the type used in large open pit mines.....81 Figure 9.