Ask The Experts
December 2015 by Chris Ralph• How do I separate silver from lead ore?
• Two questions: Is fool's gold magnetic? And how do you go about filing a miing claim?
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.
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.
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...
My intention was to end this discussion with waypoints and routes, then I found USGS maps of the Plainfield Quadrangle.
I get a number of questions from people about testing and treating hard rock ores. The simplest way, but also an expensive one, is to just have an assay test done by an independent assay firm. As an alternative...
I love to dry wash old nugget patches found by detector operators, and I have found my fair share of gold dry washing those areas. I have also found a few nuggets using a detector on the bedrock exposed by dry washing the patches.
The Bawl Mill • Our Readers Say • SB 838 and the Salem Witch Hunt • Small-Scale Hard Rock Production • Researching Mineralized Areas • MMAC & PLP Update • VLF Detector Operating Modes • Using Geologic Maps • Canadian Company Recovers 1,111-Carat Diamond • Lost Sally's Gold • Time to File Claims in Southern California • Colorado Disputes Key Part of EPA Mine Report • Picking Our Way Through Bedrock • Mining Stock Quotes and Mineral & Metal Prices • Melman on Gold & Silver