Wayne - are you suggesting the peralta's glued the heart insert - then buried them and let them sit in the baking hot ground for who knows how long? 100 years? Do you believe glue would last that long in this Arizona weather? It was 114 at the Tumlinson site today when I was showing Matt. What type of glue would have been available to the peralta's?
If the peralta's didn't glue them back together - then who do you feel did?
The glue is clear-ish with a yellow tinge.
Not the Peralta's, because I don't think they had anything to do with making them or what they actually lead to.
I think it's possible, due to something I noticed about the heart shaped pocket in the Perficio rock which didn't "click" at the time, that the red heart stone was deliberately scored and then broken. That the two cracks form a long cross, like that held in the priest's hands, and both act as a pointer. As a separate piece, the broken lobe fits into another "omega" carving, where the "zig zag" then becomes another "instruction" or "pointer". It's all related to stuff out where I think the stones apply to though, so others are welcome to disagree with the way I see it.
There is another piece of broken stone, with a missing corner. A photo of which has already been posted.
Perhaps that stone was meant to be used in a similar way.
The glue may be "hoof glue" or "animal glue", which has been around for ages. In fact, you can still buy it or even make your own.
Since hoof glue is organic, it is easily dated.
https://en.wikipedia.org/wiki/Animal_glue
Underground, in a dry climate and out of the sun, it could hold the two pieces together for a long time. But like any other glue, not necessarily forever.
There are plenty of examples of things "glued together" in museums, some of which are many centuries old.
Regards:Wayne