they mined the gold with a pickaxe
Both gold and diamonds are mined.
the Incas mined for 18362 million gold
Cabrillo mined for gold.
Gold, silver, and copper are mined in Utah and zinc is a by-product, so yes it is mined in Utah.
Gold is the chief mined product in Costa Rica.
Gold can be got by either panning by the river or by etracting it from the gold mine.
Copper and Gold
Lack of gold deposits that can be mined economically. Even if gold is present, but it will cost $2000 per ounce to mine- when gold is selling for $1000 an ounce, it does not get mined.
You need a Diamond pickaxe to mine Obsidian.
Basalt is mined at Mt Sylvia in southeast Queensland. It is also mined at the Bunbury basalt mine at Gelorup in Western Australia. It is quarried in smaller quantities at various other locations. "The Basalt Mine" in eastern New South Wales is not a basalt mine, but an open cut gold mine.
Gold has been mined anywhere from laying on the surface, to at least one mine that was 8000 ft deep.