crystal materials, types and sources

[DarthSkummelavsky]

I have poured through the threads here and have not found one the addresses crystal chamber crystals themselves. I am curious to know which materials work best (acrylic, quartz, silicon and etc...)? Next question concerns the shape (cut look, rough cut or rounded)? I found one website [http://www.paperlanternstore.com/dia...confetti.html] that sells acrylic crystals that have a classic diamond cut look to them. Has anyone every used this shape and if so, how was it to mount and how did it look once you got it up and running? Last question is where are you guys/gals getting your crystals from (growing them yourselves, TCSS acrylics {when they are in stock}, on-line store or local craft store?
Any info., pics or a simple URL would be greatly appreciated.