Guilloche stitch - Creative and festive stitch.
This would be a good project to start on, would make lovely earrings
This lady is an amazing embroiderer, and so generous with her instructions. this is the griffin stitch lattice filling
You can "dress up" many embroidery stitches by lacing them or whipping them with another thread. It's like creating a whole new stitch - only really simple! Here are some tips & techniques for lacing and whipping all kinds of embroidery stitches.