I have done a video on how to make a simple yet effective hand crusher (hand crusher if not done right). I do not have a reference to it but it is the one that GoodGuy refers to in a recent post. Quartz is a WIMP when it comes to my crusher and others! Easy. "Rotten" quartz..... vuggy (containing many holes) seems to me is most likely to carry gold. I found a piece of quartz on the Y-not claim that was purple and vuggy. About the size of a cantelope. I crushed it to a number 8 screen and found gold. Not much but readily visible. Right now, as we speak, I have about a dozen pieces of quartz that will "crash in the crusher" tomorrow! Collected today near Judy's place in Murphys, CA. Now, I clean my brand new 2013 Jeep almost daily yet allow muddy pieces of ROCK to roll around in the back. Go figure! I hope I have answered your questions. (got it...
YouTube Link: http://www.youtube.com/watch?v=DTnSzoa1EmE ) or type in TerryCieszki when you are on the yuotube sight for other videos of mine. I'm turning into a regular Frances Ford Copula! TTC