By contrast, secondary or alluvial' diamonds can be pulled from ... they accounted for about 15% of the world's $10bn trade in rough diamonds, according to Partnership Africa Canada, a human ...
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Natural Diamonds Had a Rough Year—Some Hope to Restore Their ShineIt has been bad enough that Anglo American-owned De Beers, one of the world’s largest diamond miners, reduced its rough diamond prices by 10% to 15% at its December sale, according to industry ...
A 1972 student geological excursion to Sate Alluvial Diggings (SAD) and picking rough diamonds out of gulleys, provided the author with initial insight into the richness of the areas exploited ...
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