Victorian "Pan" Intaglio Ring Resize:No the concealed clasp features a

the concealed clasp features a semi-circular button that's set flush with the outside of the band

with simple

The maker's mark EG is stamped inside the band

I don't know for certain but I'd be willing to wager that these are Australian opals

Victorian "Pan" Intaglio Ring Resize:No the concealed clasp features aO, Pan. The Great God of the Wild; the Piper at the Gates of Dawn Ancient Greek god of the wild Half man, half goat Son of Hermes and a daughter of Dryops; rejected by his mother for being half goat Adored by ALL of the Olympian gods (but particularly Dionysus) Considerable sexual energy Challenged Apollo to a musical duel (and lost) Known to create panic among humans Could be multiplied into a swarm of Pans The only Greek god who actually dies Pan is