How to Refine Silver—Pt I
September 2019 by Roger Neuscheler
Silver refining has been used from ancient times to change the characteristics of the metal. Early metallurgists refined silver by heating it a couple hundred degrees above its melting point and holding the metal at an elevated temperature for a period of time.
Unfortunately, not all the gold that we prospectors find is pretty, or appealing to the eyes. They are not all nice, bright, shiny nuggets with lots of character that carry high collector value.
Sampling gold placers can be rewarding, but remember to treat the samples so you are not high grading or low grading your results. Learn the rules and apply them so your samples are accurate.
The first step in my recovery process after milling the ore to the desired size is to table it. On this particular ore, I get good results milling it to minus 100 mesh.
In part one of this two-part series on gold in Guyana, I describe artisanal mining efforts currently winning alluvial gold from small-scale placer operations located along the lower Puruni River and its tributaries.
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.
Mining claimants who wish to retain their mining claims on Bureau of Land Management and Forest Service lands through the 2021 assessment year must pay a maintenance fee or file a maintenance fee waiver certificate on or before September 1…
They tend to be big, coming in large to extremely large sizes. They can also be amazingly rich and produce huge amounts of very high-grade ore.
The Bawl Mill • Ask The Experts - How do I remove the silvery-white coating from my gold? • Ask The Experts - Is it possible to mine glacial moraine placer deposits? • Ask The Experts - Why are some valid mining claims missing from apps when researching land status? • Ask The Experts - Is using a drywasher legal in California • A High Country Patch • An Update On The Father's Day Gold Discovery • Exploring The Historic Rand Mining District, Southern California • Disturbing Trend: Federal Judges Disregard Mining Laws • My First Carolina Nugget • Step-by-Step Crevicing • Melman on Gold & Silver • Mom Finds 3.72-Carat Yellow Diamond • Mining Stock Quotes and Mineral & Metal Prices