What a fantastic idea! I'm relatively new to fine jewelry, so I didn't even think of this Thank you!
Another option would be a bezel. I think it looks chic and casual and adds visual interest. You can also get an earring jacket that fits the bezel (I would have the same person make the setting and the jacket so you are sure they fit well).
Diamonds by Lauren ruby bezel: https://diamondsbylauren.com/index....1ctw-round-brilliant-ruby-stud-earrings-r6807
Tiffany bezel example:
Local jeweler/gemologist on Philadelphia’s Jewellers’ Row! Jeffrey Debs