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Huge Opal Sells for Nearly $144k at Alaska Auction

The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.

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Ask the Experts


Heading for Australia to metal detect for gold. Tips? Suggestions?

Hard Rock 101: Mechanical Techniques


Since we know that the secret to breaking rock is applying force from the inside out (putting tension on the rock), we will be looking at ways we can generate force using human and machine power.

The Goldfield Mining District, Nevada—Part I


An example of some of this extraordinary ore was a lot of about four tons from the Florence mine during the last days of a lease that averaged over 300 ounces of gold per ton.

California's Original Sixteen to One Mine


The Sixteen to One mine is located in the little town of Alleghany, 40 miles from Nevada City, in Northern California. It has less than sixty residents. The town sits at an altitude of 4,500 feet. In 1885, the town was named by a group of miners...

Ask The Experts - Is using a drywasher legal in California


Mining Stock Quotes & Mineral and Metal Prices


The Treasure Detective—Part III


In the 1800s, rich silver and gold mines along the eastern Sierras were supplied from Los Angeles by a wagon road with an important stage stop at Freeman Junction. Wagons carrying the gold and silver back from the mines to Los Angeles followed the same wagon road. A cottage industry of robbery arose where numerous individuals made a living holding up these wagons and making off into the hills with the loot.

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The Bawl Mill   • Ask The Experts - Can you tell me about quartz veins in New Zealand?   • Ask The Experts - Help with sluice angle and recovering silver   • Ask The Experts - What is the host rock for lithium?   • How Do I Recover Gold In Black Sands?   • Gold Prospecting for Better or Worse: Pots of Gold   • A Walk Through The Gold Indicators   • How Topography Affects Prospecting for Gold   • Getting Into Hot Water While Reclamation Dredging   • Strategies for Detecting Heavily Pounded Areas   • Drywashing Moist Dirt   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices

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