Wow! only $325 for a quartz crystal that probably cost the better part of a dollar. Seems reasonable, but wait, why don't we just go to a mineral or gem shop/show and buy a bunch of different size crystals for peanuts and then try different ones and use the one that works best. It may be $300 of work or intellectual property to have it pre-sorted for us and Lloyd is a most enterprizing guy... I think I'll opt for DIY on this one. Thanks for the tips Almarg and Perditty.
Perditty, you should go for the pretty light green peridot crystal. :)
Perditty, you should go for the pretty light green peridot crystal. :)