The list of 'G' refiners/mints/hallmarks:

• GA/Golden Analytical (to do)
• Gateway (to do)
• GDC
• GCC
• Golden Eagle Refineries, Inc. (to do)
• GDM/Goldfield Deep Mines (Nevada)
• Great American Silver Corp. (AG)
• Great Western Coin and Bullion (to do)
• Green Valley (to do)