Cave Creek's "Golden Reef" Stamp Mill is the only operational 10-Stamp Mill in Arizona. Stamp mills were used a century ago to crush hard rock ore so that gold could be separated. Stamp Mill ...

CALICO • The sounds of a 500-pound hammer crushing ore will echo through Calico for the first time in more than 100 years, as an 1870 vintage stamp mill found at the silver rush-era ghost town is ...

ANGELS CAMP - These days, folks buy homes in and around Angels Camp because they want to hear crickets chirping, birds singing and not much else. When Angels Camp native Bob Porovich was a boy, he was ...

The rocks of the Keweenaw Peninsula are ancient: More than one billion years old, containing loads of native copper deposits. Mining them created a legacy seen throughout the region. The nation's ...

The installation of the gravity pilot plant at Temiskaming Testing Labs will be commissioned to optimize plant performance. It is designed to process high-grade stamp mill tailings and waste rock into ...

Deep in the Tongass National Forest sit the remains of the once profitable gold mining town of Amalga. The town’s beginnings can be traced back to a chance discovery made by Neil Ward and O.L.

JEFFERSON CITY, Mo., Aug. 10, 2021 /PRNewswire/ -- On Aug. 10, 1821, Missouri was admitted as the 24th state in the Union. The U.S. Postal Service celebrates the state's bicentennial with a new stamp ...

A corn mill in southern Scotland is one of six UK windmills and watermills to feature in a new set of stamps. The New Abbey site stopped working in the middle of the 20th Century but, after repair and ...