Sampling, Hydro-Shocking & Cleaning Quartz-Gold Specimens
May 2017 by Reese Townes
Many specimens have a small amount of gold and are not pretty to look at. There is a nifty way to give them a makeover and make them much prettier than they were when you found them.
Some claim they can smell gold. This may be, but when I take a whiff of gold, I smell dirt, rotten eggs, garlic or just nothing: my nose is everything but sensitive.
This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.
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After your excitement peaks when you first receive the high gold assay from the vein you just exposed, you ponder how you will extract and sell your gold. You will need to develop a flow sheet for your process to optimize your recovery and minimize your costs and permit requirements.
What is the best type of mat to use in a high banker set up?
Centrifugal bowls are very efficient, and with proper operation they can consistently achieve gold recoveries above 95% with gold of about 50 mesh size.
Most prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts: How many claims can I file in Arizona? • Ask The Experts: What should I do with a large amount of old placer concentrates? • Shaker Tables for Processing Hard Rock Ores • Becoming a Successful Detectorist • Hand Panning Micro-Fine Gold • My Lucky Thirteen Nuggets • Crushing, Grinding and Pulverizing • A Break in the Weather • From the Editor • Prospecting Knowledge -- Pass It On! • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices • Over The Divide: Miles John Mitchell