In the second paragraph it says: "For instance, one emerald mine established in 1981 in Santa Terezinha, Brazil, produced a peak of 25 tons of rough stones valued at $9 million in 1988; the same tonnage of stones mined in 2000 sold for only $898,000." If I took that sentence seriously, I would have to infer that the price dropped by an order of magnitude, presumably because other productive mines had been opened. But the preceding sentences says the contrary: "Thus high-quality gems can be mined out much faster than they are produced, essentially making them a finite resource." "The same tonnage" must be wrong. Please clarify.
posted by Joseph Fineman
February 20, 2012
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