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History
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A 19th-century assay laboratory in Tombstone Courthouse State Historic Park, Arizona.
A 19th-century assay laboratory in Tombstone Courthouse State Historic Park, Arizona.
A model of a late 19th-century Canadian (Yukon) seal used to certify the quality of assayed gold.
A model of a late 19th-century Canadian (Yukon) seal used to certify the quality of assayed gold.
Colorado assay office – circa 1870 A.D.
Colorado assay office – circa 1870 A.D.
1916 photograph of an assayer performing an electrolysis test on a gold sample at the United States Assay Office in New York.
1916 photograph of an assayer performing an electrolysis test on a gold sample at the United States Assay Office in New York.
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Gold nugget
Gold nugget
1,000 oz silver bar
1,000 oz silver bar
500 g silver bullion bar produced by Johnson Matthey
500 g silver bullion bar produced by Johnson Matthey
1 oz Vienna Philharmonic gold coin
1 oz Vienna Philharmonic gold coin