The Amazing Mineral Tourmaline
December 2013 by Chris RalphIt is a gemstone, and yet it is also closely associated with many types of metal ores. It's valuable itself but often points toward other valuable minerals—that is certainly something prospectors want to know more about!
Has your experience ever led you to wonder why some gold is deposited on bedrock and in crevices, while other gold is not? We’re going take a deeper look at this and see what we can figure it out.
The hair stood up on the back of my neck when I saw this, especially the nice patches of wash in the bottoms of the gullies, a sure sign of an auriferous source being nearby.
The most obvious benches are usually near the valley floor, but they can be thousands of feet above the valley floor. Since benches were made by streams, they can contain placer deposits.
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...
...we will visit three dormant mining districts that lie in the Oquirrh Range in Utah. Some major activity that transformed the lives of thousands of people occurred here from the mid 1860s to the late 1990s.
I’ve been taking a look at the mining and uses of a number of critical metals in series of articles, and it’s time to take a look at antimony.
Copper is a critically important metal that we need to run our modern electronic society, and the long term outlook for this metal is for a steady increase in price.
The Bawl Mill • Ask the Experts • Ask the Experts • Ask the Experts • Sierra County Gold—Part I • ICMJ's Annual Index • Ophir—Possibly the Best Kept Secret in Alaska—Part II • Hunting for Hardrock: The Basics • Gold in the San Francisco District Oatman, Mohave County, Arizona • Heavy Glacial Rocks and Gold in the Midwest • Strategic Metals—Part II • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices