I have made several hundred pairs of earrings. The material that I have found works the best with my own 10w diode, is a wood product called Romark. It does need several passes to cut clean through, but the material is durable and available in a selection of colors. Not sure what the available equivalent would be for our cousins across the pond, however.
A topic that shows some of my early work:
A few earring designs - Finished Creations - LightBurn Software Forum