help ...Signs on rocks

[maestro]

Dear All,


I am new in this forum and i would like to get your help.
I am living in the north of Tunisia and recently i have been in a site with some friends and we found some signs and old stones with marks ...
We start checking the site and we found some covered walls and i don't know if there will be a hidden entrance there.
The picture number ( IMG_0280 )shows a stone that contains grains of Gold.

I am attaching some pictures of the rocks

note : the circular plate and the rock with the whole in the middle were found in a separate room .

I want to know if some of you can help me to understand if these are signs of a treasure and how i can get to it.

Thanks

 

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[kristof.wanderer]

Interesting shapes, particularly the roundish stone with the wave like pattern. Someone here can shed light on the origins... I'm anxious to see. HH!