How To
Ask The Experts
December 2014 by Chris Ralph
• Determining the amount of gold in a specimenWhat To Do When Gold Recovery and Assay Values Differ
Before going into an analysis of the ore composition, two other major factors will affect the result. These are the accuracy of the assay and the effectiveness of the mill for the gold recovery.
Twenty-Five Gold Indicators You Should Know
I frequently get asked, "What should I look for when I am out prospecting that will tell me there are good amounts of gold present in the ground?"
Using Sucker Guns to Find Gold
...if you have a good, rich spot, hand-operated systems can produce some decent gold.
Where Should I Start?
Digging in the right spots will produce excellent results, like this group of nuggets taken by the author while metal detecting during the last few months. The biggest nugget is over an ounce.
Cyanide-Free Gold Separation
Some ores—mostly those with a high free gold content—are very amenable to gravity concentration. Well oxidized ores containing coarse gold are usually best for non-cyanide processes. Ores with significant sulfide content may require the...
Small-Scale Hard Rock Mining With Water Recycling
Once I have established the presence of gold in the sample, I collect five-gallon bucket quantities of the rock material for processing back at my shop.
Crushing Quartz in Calaveras County: A Placer Miner Learns New Tricks
I had never run an impact mill before, but anything involving rocks, water and a big electric motor sounded great.
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