Summary

Red line - Cut
Black line - Engrave

You can paint the cut pieces of earrings with water colors, if you want a more airy effect. If you want to be more detailed, you can use pigmented markers with good coverage and a small tip size.
As someone who has been making jewelry for many years, another tip is to coat your colored earring with varnish. I sometimes use UV epoxy resin, and I dry varnished earrings in a UV nail lamp. You can certainly use a finishing nail polish of different gloss, and also dry in a UV lamp.

The SVG files have been optimised to work with an electronic cutting machine and can be be scaled up or down without the loss of quality. Please contact me if you would like them in a different file format, and I will do my best to accommodate you!