Thanks everyone, it’s pretty neat to have a physical connection to a great grandfather that died 30 years before I was born, a lot different from just a photograph (which are also nice too).
As for the stem I don’t believe it’s amber, it seems to be some kind of synthetic material. It’s in good shape but would need a good cleaning to be smoked. Where it attaches to the shank it’s a bit loose, I don’t really want to try to separate it for fear of cracking something. It would be fun to smoke but it’s nice to just admire it too.