Tarith deactivates the ring, before talking to Silas again.

"Fair enough, here is the second necklace and one of the remaining rubies. Thanks for the ring. It may well be a lifesaver."

After trading the necklace and the ruby for 800 gold, Tarith heads to the gate, intending on waiting for the others. Along the way, Tarith looks in the pouch provided by the duke.