Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by
mindat.org
There are no ages for
Gold
at
Rocky Bar Quartz Mine (Rocky Bar Qtz.; Rocky Bar Mine; Rocky Bar Vein), Massachusetts Hill Quartz Mine (Massachusetts Hill Qtz; Rocky Bar Mine; Boston Ravine Claim; Great Britain Claim; New Rocky Bar Claim; New York Hill Claim; Polkinghorn Claim; Rocky Bar Claim; Stockbridge Claim), Empire Star Group (Empire Star Mines Company Holdings), Grass Valley, Grass Valley District, Nevada Co., California, USA