Soldering process fixes each pieces of glass together, it is made by hand, so has the randomness of handwork. The uneven black lines are the marks left by crafts men, and also it is the unique style of Tiffany lamp shade.
Colored glass is the original color glass material processed by special technology into different colors and different patterns.
The large glass has its texture, when it is cutting into small pieces, knocking will lose the original sound quality. Colored glass is rich in color and does not fade after transmission.