Hi, I want to start with a compliment, the wood burning looks really great.
I love the colors and the feeling of burned stoneware that the image transmits.
On the other hand I think you loose a lot by using the dragonfly charms. The idea could be good but the charms look a bit cheap and give a feeling of mass production and don't do you a favor in my opinion.
What I also like a lot is the back of the earrings and I think you have not put enough accent on it, I would suggest to take a close-up picture of the back too and ad it to the collage.
What I can't see very well on the image is the edge, but in the lower image the left earring looks a bit rough, maybe you could sand it a bit and try to smooth it up at the cutting edge.
Overall the impact is great and the earrings look wonderful on the model.
Continue the good work I wish you a lot of inspiration !