I’m making the assumption if you put another embellishment on the piece of gear with +1 Sparkle, it will remove the +1 Sparkle?
This is making me so sad I have to put an embellishment back on my ring. I didn’t know about the +1 Sparkle line until I removed its embellishment for last season. I don’t want to lose my +1 Sparkle. 
I’ve actually been trying to work around another piece of gear to craft instead to keep Sparkling. 
(Yay for posting in the right place this time. LOL)