I'm a newbie here so pardon me:
1. If I say things that have already been said
2. If I tread on anyone's toes
3. For my ignorance
I'm a bit old and stiff to be doing much mining now (although I managed Hetherington's X cut in Smallcleugh last year - and paid for it with days of aches and pains afterwards) but I was much more agile in the 60s and 70s. I agree with Skippy's remark above about polarised attitudes about taking things from mines. Leave them where they are, or rescue what you can. I do not recollect such a polarisation 30 or 40 years ago, when things seemed more relaxed and one could go dig up minerals in the Lake District, or wherever, and no-one cared. Why things have changed I know not, although I do know that the Lake District National Park Authority's ill-thought out mineral collecting permit scheme has badly aggravated the mineral collectors and provoked a militancy amongst some I had not seen before.
"Conservation" seems to be all the rage now and seems to be the "justification" for prohibiting removal of items, be they artefacts or crystals. However, I cannot help but suspect that "leave alone" conservation policies that are fine for Lady's Slipper Orchids, or rare butterflies, may not always be appropriate for mining-related remains. As has been alluded to in this thread, anything in mines is in danger of loss anyway. The argument that removing things from mines is thereby saving them does carry weight. Whilst insisting that EVERYTHING is left totally untouched (to face inevitable loss when it either decays away or the mine collapses) as Jasonbirder does strikes me as a dogmatic attitude worthy of the Taliban.
Of course the purists might object that the artefacts now safely, and no doubt lovingly, cared for in Skippy's mineral room are now effectively out of sight of those who'd like to see them (and his offer to remedy this by giving them to a public venue like the heritage center is commendable). But if they were going to end up out of sight anyway because either someone else, perhaps less caring, would have taken them, or because they'd be sealed in when the mine fell in (or just carried on rotting and rusting) then what does it matter?
A further point that merits being made is that not all of us are able to go down mines and see their remains or minerals in situ. I can still manage it, but only just. My days of dancing across the stemples, or dangling on ropes, are behind me. Even easy, and not too wet, venues, like Smallcleugh will soon be beyond me as age takes it toll. Likewise children and many others cannot, or will not, venture underground. Are they to be denied the chance to enjoy our mining and mineral heritage because some purists insist that everything stays down a muddy hole under it has decayed to nothing or been buried by collapse? Unless the mine itself can be turned into a show mine (only possible in a handful of cases), there is surely a case for removal of items to places where the public can enjoy them.
It should be obvious now which side of the debate I take, although I am not saying one should rip a mine to pieces to "rescue" every last drill rod or crystal, but, whilst acknowledging it can be fun to see them in their original home, if your home was falling in would you stay inside?