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[echarter]

The Russian, Botswanan and "new pipes" do not count. The Orapa, Finsch, Archangel, Argyle etc. do not count. The average grade of a historic SA mine was 23 carats per bundred tonnes. The new pipes, and the Russian, Argyle and CDN pipes skew the figures a bit.

You have to count size too. The Premier, at 30 carats/HT which produces a prodigious amount, and has produced for 100 years, brings the average down a great deal.

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