On the Christmas Eve episode of GH, Kristina found the shooting star necklace Jason gave Sam years ago. Later, Jason ran into Sam and Danny in the park and recognized Sam's necklace. Sam's necklace used to be available at ABC's Seen On store several years ago, but the website is no longer in existence. Below are two screencaps of Sam's necklace from the episode and several options for similar necklaces. Let us know in the comments if you know of a better match.

I found several options for star pendant necklaces that are similar to Sam's. Click to check them out below, and use the arrow at the right to see all the options: