The Atlantean Amulet is a golden piece that was broken in half. The first piece was displayed in a museum in Bikini Bottom. In the TV movie: Atlantis SquarePantis, the second half was found in a cave. It was soon put together, and it presented a Van to Atlantis.
It looks like a golden piece that belonged to Atlantis. It has a big A in the middle. It had a great sparkle coming out of it and it was presumably made of gold.
The Amulet was taken off the Vantis by Lord Royal Highness, and then thrown into a dumpster.