Print at 10mm/s on everything. 1 wall. arachne mode- If petg is bubbly extruding, try turning down the temp to the lowest reccommended for the PETG you are using due to the super slow print speed. If using PETG with glitter, you may have to go a little lower than on the spool.  I optimized these for the clearest layers possible, 5 layer on each earring. Try turning up flow ratio if you are having trouble with adhesion. Try using a holo special effects plate for that “crystal” look. cylinder for earring hook has a 3mm(d)x2.5mm (h) if you decide yo split into objects