December 2001 by Edgar B. Heylmun, PhDOnly the so-called “precious gems” will be considered in this article. They are diamond, ruby, sapphire, and emerald. A “gem” must be rare, hard, and durable, and possess a unique color or quality in order to be classified as a gem.
It has been claimed that the introduction of excess air to the assay furnace during sample fusion can materially increase the gold yield. Testimony by expert witnesses for the defense in recent federal hearings dealing with the dependability of the gold fire assay includes data purported to show this.
• Not so happy birthday
• Even more support for the PLP
Several nations around the world are working diligently to make their countries more attractive to resource development as a means of improving economic development. One such nation is Cambodia, located west of Vietnam, south of Laos and due east of Thailand.
Bribery allegations against four Rio Tinto employees detained in China are “wholly without foundation,” the mining company said, as Australia continued to press Beijing for details of a case that is straining ties between the two nations.
New Mexico’s Ortiz Mountains rise in irregular volcanic peaks above the surrounding plains, or llano, some 30 miles northeast of Albuquerque and about 14 miles to the south of my home outside the state capital of Santa Fe.
The Bunker Hill Mine is doing its part to help tsunami victims by sending crates of bandages impregnated with silver to Indonesia.
The need to bring mining back to North America is more urgent than ever.
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