Prospecting & Detecting
Determining The Optimal Crushing Size for Gravity Recovery
February 2020 by Steve Gaber
It’s not easy to figure out what is best without testing, and so a certain level of confusion has developed about how small the ore ought to be crushed.
Detecting Alone -- What to Look For

Rediscovering Placerville, California Part II
To get to the gold, the miners had to remove the shale pieces and stack them on the sides while sluicing the remaining material through their boxes.
Northwestern Alaska Mineral Resources

'Outer Space' Diamond Headed for Auction
Black diamonds, also known as carbonado, are extremely rare, and are found naturally only in Brazil and Central Africa. The cosmic origin theory is based on their carbon isotopes and high hydrogen content.
Buying a Mining Claim: Questions to Ask

All About Quartz—Part I
One of the first minerals most prospectors learn to recognize is quartz, because, in the right circumstances, it can be an excellent indicator mineral for prospectors. Quartz is common, easy to identify, and is often associated with gold and other valuable metal deposits.
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The Bawl Mill
• Ask The Experts - Can you explain how caliche forms?
• Ask The Experts - How does gold form?
• Ask The Experts - Do you think it’s realistic for a detectorist to recover a couple of ounces per week if working full time?
• Ask The Experts - Can you suggest proper discrimination settings for my detector?
• Time to Stake Your Own Mining Claim
• A Day On The Yuba River
• Gold Prospecting for Better or Worse: The Pains of Prospecting
• To Foam or Not to Foam
• Following Man-Made Ditches to Recover More Gold
• Sixteen to One Gold Mine: Going Underground - Pt II
• All About Native Silver
• Internet Forum Gold
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices