Mineralpedia Details for Gold
Named from antiquity as the Old English word for the metal, and possibly related to the Sanskrit wok jval. The chemical symbol, Au, comes from the Latin word for gold, aurum. Gold is a common and widespread mineral in small amounts in rocks of many kinds as well as in sea water. It is found in epithermal veins, pegmatites, contact metamorphosed deposits, and in placers. Localities for fine specimens include in Russia, Romania, Australia, New Guinea, South Africa, Canada, the United States including famously here in the Black Hills of South Dakota at the Homestake mine, Venezuela, and Brazil. Hundreds of other minor localities.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/gold.pdf
Gold from Eagle's Nest mine, Placer Co., California, United States
Large leaf Gold to over 3.5cm.
Gold from Harvard mine, Jamestown, Tuolumne Co., California, United States
Brilliant leaf Gold to 2cm showing crystal outlines.
Gold from Alpha mine, Lawrence Co., South Dakota, United States
Gold to 1mm in Deadwood Fm quartzite.
Gold from Homestake mine, Lawrence Co., South Dakota, United States
A good example of how much of the ore was like at the Homestake mine. That is to say, tiny 1mm grains in Cummingtonite schist with Quartz.
Gold from Santa Gertrudis mine, Sonora, Mexico
Coarse grained crystalline Gold strung out through siliceous sedimentary matrix.
Gold from Red Lake mine, Balmertown, Ontario, Canada
Leaf gold FOV 3cm.