Hi Jd,
It (your little error) is also compensated by a couple of other things:
1. 1m3 would be between 1.8 and 2.5 tonnes, not 1 tonne.
2. There is anecdotal evidence that diamond grades of many more carats/100 tonne were mined there in the past.
ps...I've held CFR for ages, but generally sit on the sidelines now...
cb25
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