Signet Ring

"It means a lot to me. I didn't always have a family, you know. Still, 'tis only gold..." - Alexander, upon pawning the ring the Hakim in order to obtain the magic map of the Green Isles.

Alexander's signet ring is made of gold, ornamented with the lion-and-unicorn crest of Daventry, and a large yellow topaz.

When he washed up on the Green Isles after the wreck of the Johannes Bey, it was one of the few things not lost at sea, and the only proof of his identity he carried. He first used it to announce his arrival at the Castle of the Crown, but his audience with Abdul Alhazred didn't go well. He later had to pawn it for the magic map of the Isles, only able to get it out of hock with a giant pearl obtained from the Oyster Beds on the Isle of Wonder. Alexander used it to introduce himself to Jollo, the court jester. Jollo was surprised to see Alexander had actually made it to the Isles, and excitedly told the prince that Cassima was just as eager to see him as he was to see her. The last time he used it to prove his identity was when he sent the ring to Cassima via Sing-Sing.

At Alexander and Cassima's wedding, he gave it away for the last time - as his new bride's wedding band.

Behind the scenes
The description of the ring comes from the King's Quest Companion, Version 4