W.T.F is with the hot pink tourmaline? I've done some basic geology - up to sophomore level - and NEVER heard of it being hot pink!!
Author's response
Depending on the impurities, tourmaline can be any color from greenish brown to a dark red. I studied this very carefully and selected the stone most suitable for Tonks’ lightsaber. If you insist, just imagine she used impurities to change the color. That’s how I had Ron alter his from Citrine to ‘Chudley orange’. By the way, neither rainbow quartz nor tourmaline is suitable for lasers.
Alorkin