You have not proved that a geologist can't estimate Li grade by...

You have not proved that a geologist can't estimate Li grade by eye. If the rock contains economic grades of lithium bearing minerals (as I've said to you many times now) the rock will be comprised of between approximately 8% and 16% of these minerals by volume (if those minerals are spodumene, in the large, and the other minerals that make up the pegmatite don't have densities significantly higher than the lithium minerals, which is a very case).

Here is a photo of the claimed high grade rock chip sample with Li2O grade of 2.24%.


If the lithium mineral is all spodumene then ~18% of the mineral grains in that photo are spodumene. Maybe @blastfurnace can help by identifying the lithium minerals in that photo for us (~18% should stand out like dogs balls if it's spodumene IMO).

To estimate the lithium grade of that sample it would be a simple matter of identifying the lithium minerals and figuring out their proportions, then estimating each minerals volumetric content in the rock. Once those numbers have been estimated one would use the theoretical maximum Li2O content of each lithium mineral identified and then use the original proportions estimated to figure out a weighted average theoretical maximum grade for all the lithium minerals and from that based on the proportion of lithium minerals in the rock compared to non-lithium minerals in the rock the lithium grade can be estimated to a degree of accuracy which could also be calculated based on the degree of error of the individual estimates. This would give a reasonable estimate of grade.

And as I said if you are an untrained geologist you could use a spectral contact probe and put it up against the various crystal forms in that sample to check. This would assist in not getting the grade estimation wrong.

If you had bothered reading my previous posts you'd know the reason they could observe lithium minerals in that diamond core is because practically none existed. That's a pretty easy grade estimate in my book. NO LITHIUM MINERALS = NO GRADE.

You continue your character assassination based on no facts again. Give us some facts. Esh