I'd love to hear more on methods of estimating worth. Here is another quote from "The Big Score". This is their first 'hit', hole #2.

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'The suphide cores filled eight boxes. There was more then 30 metres of the stuff. Verbiski tried to calculate their fortune. 'There's $10 million for us,' he said, pointing to one box. 'There's another $10 million over there, and another $10 million.' After a few minutes he gave up. It was too big to comprehend. He summed up his feelings when he recorded the day's results in his field book. 'Massive, massive, massive,' he wrote.

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Sounds a bit hyped perhaps, but also sounds like a whole lotta mullah!

BK