Nice question
One I didn't expect and felt very strong...
I already had my Uluru amulet tumble. Then months later I saw opal chalcedony tumbles, new in the shop. They resonates like crazy, and what I had not expected... I felt an immediate connection between it and the Uluru tumble.
The owner didn't know where it came from but I found out at home: Opal chalcedony is mined a few hundred km above Perth, west coast AUS!!
Uluru amulet somewhere in Queensland (east coast) AUS.
Both clearly have an energetic connection to Uluru which is in central Australia.
That is not in any book, not as far as I know anyway.
Also... I have a dragon stone tumble from Austria. NOT the default dragon stone which is bastite. This is cinnabar & green epidot. A rare crystal.
This is what it looks like:
THis Austrian Dragon Stone resonates like crazy with the Australian Opal Chalcedony and thus also
indirectly with Uluru and the Uluru Amulet.
Also not in any book, I doubt most even know this type of Dragon Stone from Austria to be honest. Cannot even find it online, except for the Dutch shop I tend to buy the majority of my crystals.
So all these are in close proximity of each other!
To make it even more interesting... my Caribbean blue tower and small/medium skull always stand close together with... my 2 Uluru amulet tumbles in between!
This also resonates like crazy?!