Black stone from Tablet of the Slaves Chac Zutz identification help needed

[icedgold10]

I purchased these 2 detail pieces today at a yard sale. They are some sort of stone . What I found interesting is when I removed tape from information taped to the back it came of black. Kind of like a charcoal type thing. They are abput 4" each. They were purchased by an older couple in Costa Rica a long time ago. Can any one tell me more about them? The information taped to the back was" 86 Detail from the tablet of the Slaves palenque dated A.D. 730 Shown here is the head of the lord. Chac Zutz who sits crossed legged on either side of him placed a man and a woman carring offerings on their head".

 

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[wvwildman]

looks like slate

 

[icedgold10]

They do look like that in the picture but way different material. I know slate pretty good. No layering on these at all. Thank you for your input.

 

[GatorBoy]

This is a reproduction of an ancient Myan Hieroglyph found on the walls of pyramids and temples in palentique.

 

[GatorBoy]

Palentique is an archaeological site.
Those sell for about 60 dollars a piece.

 

[icedgold10]

do you know about what time period they were made? I paid $5 at the yard sale for them so not a bad deal.

 

[GatorBoy]

Not a bad deal at all.
I don't know when your pieces were made but you can probably find info on similar items and the archaeological site fairly easy on the computer.
I would have bought them too.
As just a curiousity.