What happens if you collect all 12? Is this the secret of the Golden fleece ?

I think you need to post more information, because the average Joe will not have the foggiest as to what you are talking about.

And if I’m correct, there was a stone raised for each of the 12 tribes - which they done on numerous occasions, like crossing rivers, etcetera. And to my knowledge were simply collected from dry riverbeds or from the surrounding area, with no secret powers or otherwise important attributes. Just a simple reminder! And I think you will find the Golden Fleece has nothing to do with biblical references, but rather Greek myth!