Peregrine Diamonds Ltd. PGDIF

RE:RE:RE:RE:RE:Any day

[xDeBeers]

De Beers South Africa had a state of the art caustic fusion laboratory built in Kimberley in about 2000. An amazing facility. It could dissolve everything except the diamonds. Diamond recovery was near 100% and it was a big facility. 1.8 tonnes would be no problem. So when I picture the SRC doing caustic fusion, I am picturing them doing ALL of the 1.8 tonnes. The density will be quite high so it is not as large a volume as you would think. Given the 508 tonne bulk sample cost, what was it $2M?, I would expect all the 1.8 tonne (or 1.95 or whatever it is exactly) to be cooked at SRC.
So once you have ALL the diamond, micro and macro, you have the population curve EXACTLY. No statistics or inference required. You then find the co-efficients that define this curve and you can then use them on microdiamond results to infer the macro population from other samples.  The assumption here is that you are sampling the same facies (part) of the same kimberlite (CH-6).
Ekim posted a link to the SRK lab. Maybe it will show the throughput of the lab. I would be surprised if it can't handle all of 1.8 tonnes.

-I expect the grade to be spectaular for the CH6 bulk sample because ALL diamonds will be captured, they will be cleaned up nicely by the process, there is diamond concentration at the surface, and there is already evidence of a macro population with excellent quality based on visual inspection.