Hello [jbuenavides, thanks for efforts mate, my grandad had it for years,he loved ancient and antique stuff, all I know it's islamic written,it could be Ottoman ring,
I'm pretty sure that is what is known as a seal ring and the stone may be carnelian. It probably is ancient. I used to collect ancient stones, dzi's, etc. I still have a man's silver ring with a large piece of red coral in it.
That culture very much puts value on talisman stones.
Hello villival, yes you are right it is ring seal, would love to know, what it's means, I would like to sell it on ebay etc, juts don't know what price put,
Yuris,