History & Geology
The Amazing Mineral Tourmaline
December 2013 by Chris Ralph
It 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!
Critical Metals: Lithium
Prospecting for lithium deposits can take a number of different directions, because this metal can be extracted from a variety of geologically differnet sources.
Glaciers and Placer Gold Deposits
It also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.
Prospecting for Diamonds in Kimberlite
Kimberlite is very difficult for geologists to find, let alone prospectors and rock hounds. This is because kimberlite is rarely exposed on the surface and few people know how to identify the rock.
The Amazing Mineral Tourmaline
It 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!
Ask the Experts: VMS ore
Q: Are there any mills that handle VMS ore?
Gold in The Silver Crown District, Wyoming
When my field assistant Jay Roberts and I entered the mine, it appeared as if someone just walked out of the mine, turned off the lights and never returned.
Bedrock Gold: When It’s There and When It Isn’t
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.
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• 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
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