Featured Templar artefact?

bought this strange stone. could it be a templar artefact? On the back there is a unknown symbol. It is a real stone. i still wait for an answer where the owner got it from.

 

That could be from the Crusades ......

but I'm not sure that artists signed their work back then...??????

 

i don´t know if the inscription on the back is a symbol or a signature. Could also be a mason mark.

 

Maltese ?

 

yes it could be both templar and maltese.

 

That’s a very cool thing,you really do find some interesting stuff..Also wondering about that signature looking mark (as Komo pointed out)

 

just heard from the owner that in was found in an old tinn can with a lot of relegious objects.

 

the stone looks old , but the carving and mark on the back doesn't in my opinion, looks too fresh