RE: Share price of around 1p is about right29 Mar 2024 16:09
So from all the recovery rates I've seen on IAC-style rare earths projects, the ones in this RNS are at the higher end for pH3, and not quite sure where you found orange juice to be pH 4.2, it's closer to pH 2.5 - 3 from what I know, see for instance Table 1 in this scientific paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6898880/
Where things become much more expensive and environmentally more impactful is when pH 1 is needed in the acid leeching, I'm not quite sure why the RNS includes both recovery rates at pH4 vs pH3, but possible to show that a relatively small increase in acidity from 4 to 3 vastly improves recovery %, especially when looking at Zone 3 (which also seems to be highest MREO grades) and especially the 79% Tb and 67% Dy are exciting to me given that these are the most valuable REOs.
Also, please consider these are the very first recovery rates, one resource that Rupert compares initial results to is MEI, and look for instance at this RNS by MEI: https://wcsecure.weblink.com.au/pdf/MEI/02779218.pdf
Initial recovery rates for MEI were 32% Pr, 59% Nd, 21% Dy, 41% Tb, look at the increases in the RNS. Cobra again is known for focusing on metallurgy a lot (and some here would say they focus on it too much, Richy was one of the people being quite critical about the amount of metallurgy going on I think), so it is very likely that recovery rates will improve considerably as they understand the specifics of the resource better and better.
On your question if I think it's economic or not, there's work left to do and I think Rupert is the first one to be honest about that, you have many explorers who will always make it sound like "in 3 months we go mining", while both Rupert and David Clarke have been open in the interviews that the pilot project with first production would be 15-18 months from now still. If ISR works as extraction method, you can be absolutely sure that these grades are economical and that much lower grades would also be; of course there's no comparables in REE space, but the slide that compares the biggest companies in uranium and shows that profit margins are a lot better for Kazatomprom with 0.06% uranium grades with ISR vs Cameco that also has a high-grade hard rock resource of 8%+ grades: https://cobraplc.com/wp-content/uploads/2024/03/20024.03.25_bloand-results.pdf
You won't hear me say "This will DEFINITELY work", there's work to do, this was the first drill campaign that really targeted Boland in a systematic way. But it looks good, imo very good indeed, the scale and very low-cost extraction prospects are what makes this resource so exciting to me, well, paired with a market cap of 7m£, it's not at 70m£ like Pensana or 250m£ like MEI, the grades, hey, I'm not shouting from the rooftop about them, but from all I can tell, they look economic enough, and ofc REE prices would additionally go through the roof on any China/Taiwan escalation