When one looks at the value of a kimberlite pipe, they need to look at size, quality, inclusions, and also colour of the stone.
CH-6 valuation model is based heavily on the white/colourless stones that it produces. Here is a look at the colour distribution from 3 main sample populations.
The bulk sample was completed at surface in amongst the less dense weathered kimberlite. The pre-2017 core was basically core drilling processed with caustics and was drilled down to about 250 metres. The 2017 core was the recent program where they not only targeted the top 250 metres of the pipe, but also focused on defining the part of the pipe between 250 metres down to 500 metres. This last core drill program produced the 4 fragments of a unique green stone.
The great news about these ratios is that the white/colourless population is pretty much identical between the 3 sample populations. That gives good indication that mine production at Chidliak would produce about 40% of nice clear white/colourless stones on a regular basis.
The Off-white population is a bit more variable, but still shows a mine production that produces at least 30% off-white stones.
The next colours (Yellow, Grey, Brown and Green) are quite variable among the 3 sample populations. Grey and Brown are showing in very small amounts in the core samples, yet was prevalent at surface in the bigger macro population within the weathered kimberlite. Is this variance due to size of the stones in the sample or is it to do with the locale of the sample? The opposite was true with the yellow population. The Bulk sample had less yellow then the two core populations.
It is probably safe to say that a mine at CH6 chidliak would produce up to 30% of varying combinations of yellow and grey/brown with the yellow's slightly bleeding into the green landscape. Most of this material will be on the lower end of the value spectrum with the exception of the bleeding into the green colouring. If green stones are produced in any statistical quantity at CH-6, that could add significant $$'s to the project.