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Greenstone
August 2004 by Edgar B. Heylmun, PhD
Greenstone is a hard, tough, altered igneous rock, usually dark green in color. The term “greenstone” has been loosely applied to all greenish rock, including peridotite, dunite, jade, serpentine, and even hydro thermally altered rocks in mining districts. True greenstone is...Diamond Dealer Prevails in Congo
The one he’s rolling around in his fingers is nice—5.23 carats, nearly the size of a marble, pure and white. But the diamond that Alphonse Ngoyi Kasanji is talking about is the big one—the one that got taken away.
The Bawl Mill
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The Hill of Gold
I was amazed and surprised, and I took a moment to admire how beautiful this coarse chunk of gold was. It later weighed exactly one-half ounce.
The Bawl Mill
• Set for life...at everyone else’s expense
• As long as we’re giving away money...
• Consulting pays well in NY
• The old bait and switch...
• Not an enviable record
What Was That Article Again?
Have you ever waded through your pile of Mining Journals looking for a particular article? The annual index, published each December is a great help, but I have a better idea.
Ask the Experts
• Building a jaw crusher
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The Bawl Mill
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