From the plaque:
The tablet commemorates the
discovery of gold-bearing quartz in California. The discovery was made on Gold Hill by George Knight October 1850.
The occurrence of gold-bearing quartz was undoubtedly noted here and elsewhere about the same time or previously, but the above discovery created the great excitement that started the development of quartz mining into a great industry.
The Gold Hill Mine from 1850 to 1857 is credited with a total production of $4,000,000.00
This monument dedicated by
Quartz Parlor No. 58 N.S.G.W.
Manzanita Parlor No. 29 N.D.G.W
October 20, 1929