Ori ring
From The Stargate Omnipedia
Ring worn by Adria, and the facsimile of Osric while she was impersonating him. Markings on the ring are distinctly Ori in origin, which tipped off Daniel Jackson to the fact that "Osric" was not who he claimed to be.
KEY EPISODE
The Quest, Part 1 - "Osric" contributes a ring he had been wearing into the treasure chest -- but Daniel sees the Ori markings and discerns that Osric is Adria in disguise.