Let me start off by saying, beauty is in the eye of the beholder. The quality relates to the artist's experience.
How can you tell?
Here are a few quick ways to identify if the piece is made by someone with experience:
1. The solder lines are consistent (not wide in one area and narrow in another).
2. Each solder line is raised slightly (not flat against the glass).
3. There are no little bubbles, cracks or holes in the solder lines.
