What would Be A Cool Magic system and world based around glass blowing?

[GunslingerRadiant]

This is an idea that popped into my head at a museum. What if there was a world with magic glass, that could be formed into shapes with special effects? What different kinds of glass would there be? Anyways, I want some input.

[TheSurvivorofDeath]

Would the magic be just magic glass or the manipulation of glass for magical purposes. Because if it’s just magical types of glass you could use special sands or colorings/dyes, the color distinguishing the kind of glass. The magic glass could have all kinds of possibilities, which you could get inspiration for from Alcatraz vs Evil Librarians. You could also throw in the shaping of the glass to adjust the effect the type gives. That could make containers do different things than windows or mirrors or glass knives or whatever else. 
On the other hand, if it’s the manipulation of glass to produce magical effects, you can go even crazier. The magic user could instill an ability into blown glass as they blow it, making anything possible as long as they know what they’re doing. The limitations and possibilities would need some consideration, but it’s a good idea. The glass objects could maybe even produce greater effects after being made when the magic user uses them.