Re: cauliflower-shaped rock some type of quartz?
Dan, your rock looks like a quartz geode. The heavy weight you described sounds like it's not hollow inside, but solid quartz stained with hematite. There may be a small pocket inside containing clusters of quartz crystal points. The only way to know is to break it open. Good luck.
From John - July 28, 2010 at 08:38:24