Is there more information available on completing the ornament? Thank you.
I don’t have anything prepared.
It easier to do a lot of the work on the ornaments off the lathe.
sanding the faces on disc or belt sander. Sand the hole With a drum sander ( I use one in a foredom) a drum in a drill press work well.
I drill a hole through the top ( and sometimes on into the bottom). This is easiest to do on a drill press with some vee blocks. You can grip the ornament between the jaws of a Chuck - this centers it side to side really well but takes a lot of fiddling to get it centered the other way. I Mark where j want to drill with a scratch awl. I either drill through a point or through a face. I put the tailstock center point in the scratch awl hole and advance the tail center to seat the ornament in the Chuck then use a Jacobs chuck and small drill bit.
if you really get into production. It is faster and material saving to turn the 3 sided cylinder without parting in, drill a deep hole and slice the ornaments off in the bandsaw.
then I turn a small bell or finial to hang from the top or a Christmas tree, snowman, or candle to sit on the bottom.
These all have tenons to match the drilled hole. 1/8”
you can also put 30mm or 40mm glass cabochons over the holes.
Use double sided tape to hold the ornament on a round piece of wood with a hole in the center,
To center the ornament I use a small cone of the tail center to center it on the wood the point goes into the hole in the wood’s center. Turn or drill a recess to hold the cabochons. Glue the cabochons intro the recess with 10 minute clear epoxy. plain clear cabochons can look nice. but...
The cabochons maginify things behind them a bit so you can out objects inside, glue small pictures etc.
Paint the flat surface in the cabochons with red or green nail polish with glitter in it. Take 2-3 coats.
Then you have a shiny red or green eye catcher.
hope this gives you some ideas.