Highbanking and the House Rock
June 2010 by Tom LeftwichI hit bedrock at two feet and followed it down as it appeared that I was on the edge of a rib that ran with the river. This was beginning to look very promising and I was seeing some small gold—pieces and flakes—in the header of my sluice box.
Placer mining, whether for profit or recreational purposes, involves separation of free gold from the gold-bearing sands (gangue) of alluvial deposits by methods using specific gravity. The free gold can vary from 17 to 19.3 in specific gravity terms, depending on the alloy mix, which is usually silver, but can be copper, lead, sulfur, tellurium, antimony, or mercury.
I get a lot of questions from prospectors about garnets, their value and what they tell us about the geology of some types of mineral deposits. So I thought it would be a good idea to take a closer look at the lowly garnet and learn a bit more about it.
The process of recognizing ores all starts with being able to recognize some basic minerals and knowing what hard rock ore looks like in the districts where you prospect.
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Robert Joseph Dahlke
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The Bawl Mill • Legislative and Regulatory Update • Sluicing at Rocky Bar, Idaho • Nine Pound Nugget Found In Northern California! • How Much Gold Is In My Gold-Quartz Specimen? • Glaciers and Placer Gold Deposits • Ask The Experts: Can you help me identify these items? • Getting The Most Value From Your Gold-Quartz Specimens • Fix or Replace, Depreciate or Write-Off • Melman on Gold & Silver • Mining Stock Quotes & Mineral and Metal Prices