Clark, Gruber & Co. was a well-known private minting firm in Denver, Colorado, in the early 1860s.
The $2.50 and $5 pieces of 1861 follow closely the designs of the 1860 issues. The main difference is found in the legends. The reverse side now has CLARK GRUBER & CO. DENVER. PIKES PEAK now appears on the coronet of Liberty.
Very little is known regarding the mint of John Parsons and Co., although it is reasonably certain that it operated in the South Park section of Park County, Colorado, near the original town of Tarryall, in the summer of 1861.
Records show that the Conway mint operated for a short while in 1861. As in all goldmining areas the value of gold dust caused disagreement among the merchants and the miners. The firm of J.J. Conway & Co. solved this difficulty by bringing out its gold pieces in August 1861.