The Geology of Diamond Deposits

May 2019 by Chris Ralph

New theories have been developed and they may lead to new discoveries and give prospectors some new insight on where to look for diamonds.

Iron Ores and Iron Mining

September 2015
For more than 40 years, iron ore prices have been decided by private negotiations conducted between the largest of the iron miners and the largest steel producers. These two sides dominate both the spot and contract iron ore markets.

Using Vegetation and Soil Conditions as Prospecting Aids

January 2013
Wouldn’t it be great if you could know if there is gold in the ground without setting foot on the ground? Well you can, to a certain extent, if you can recognize mined ground from unmined.

Gold Ores of the Delamar District, Nevada

August 2014
Even as late as 1906, Delamar was second only to Tonopah and Goldfield in production outshining many better known areas. Since the first discoveries, more than 700,000 ounces of gold have been produced from the mines here.

Critical Minerals: Tungsten

July 2017

Because tungsten minerals are heavy, exploration can be done using stream sediment samples. Prospectors looking for gold have found scheelite or wolframite in their placer concentrates, and in some cases this has led them to make important tungsten finds.

Critical Minerals: Gold

August 2011
A few quick calculations show that approximately 11 tons of gold are lost each year just in the manufacture of new cell phones.

Ask the Experts: VMS ore

August 2012
Q: Are there any mills that handle VMS ore?

Round Mountain, Nevada

May 2014
There are a number of veins in the disseminated mineralization, but the principle ones on Round Mountain are known as the Los Gazabo and the Keane.

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