What you're saying could be true. It could all be natural. But take a good look at the notes and the position of these stones. To me, when you combine everything, together it all forms a 75% likelihood of a cache being buried here. Look at that heart. Just look at the diamond. The diamond is perfectly symmetrical when you measure the face. The two upper sides are exactly 2" each, the bottom two sides are exactly 1.5" each and the line going through the center is exactly 2" long. That heart is beautiful man, look at it. These stones if nothing else are extremely uncanny to be found right next to each other at 12' depth.
I think it all depends on what is actually buried here. If it was nothing but a few gold bars I would say it would be unlikely for anyone to go through such trouble to conceal it. But what if its a horde of diamonds? What if its a collection of maps to several other treasure locations? We can't know...
There's a few things I'll add. First is that the rocks appearing to have possibly been manipulated by man,
may most likely have been easily shaped by another rock, which doesn't leave tool marks to be removed,
like from a chisel or flaking. Nothing you have shown was ever flaked, & is not the right material to flake.
Even if there is something metallic below the rocks you found, it doesn't mean it's even cached treasure.
I doubt that it's even an archaeological find, unless you were to find some kind of old human or animal
bones. Archaeologists are most likely not to even be very interested in your rocks, & if you did happen
to find something significant left from an ancient encampment, possibly laugh if you mention treasure.
Be aware of archaeologically minded people, who will tell you that you cannot & will not ever be able
to recover a treasure, because since they likely never have, it's just simply impossible. Then, there
are so many state & federal treasure laws, unless you can acquire a permit, it may be illegal to dig
for treasures, even on land you hold deed & title to. Yes the layers could have happened naturally.
You may also have located deep springs of water, and the placement of the rocks, depths & sizes,
relativity of the distances apart, may all be coincidences, and if you were actually onto an actual
treasure cached by Jesuits, there would most likely already have been multiple death traps that
would have been sprung. Besides, the Jesuits have been known to use specific markers & other
ways of relocating caches, as well as shallower depths, vaults with cap rocks, some apparently
rock lined, back-filled & rock capped. They could also make a kind of concrete, & color match
it to blend in with the naturally occurring colors present. Even if all the surface markers had
been removed by development, it doesn't seem likely they would have cached that deep, &
not even in potentially ancient cave that may have sometime in the distant past collapsed.
If you could get better equipment perhaps a better determination could be made. But it's
not worth risking life & limb, based on the clues you've presented, too much speculation.
You have apparently defied safety, & gotten away with it so far. Do a lot more research
like you are now, & you'll most likely get a better perspective. You've put out quite a
considerable amount of time & energy. But even a fantastic treasure, will do you or
no one else what you hope to accomplish, if you're devastated with human loss...