Show sample as: 72-frame QuickTime VR or 360-frame QuickTime movie loop.    My periodic table poster is now available! Boltwoodite. I think it's the yellow crystals on this rock that are the actual Boltwoodite: I have no idea what the rest is. Source: SoCal (Nevada), Inc Contributor: Theodore Gray Acquired: 3 June, 2005 Price: $28 Size: 1.5" Composition: (K+Na)[(UO2)(SiO3OH)](H2O)1.5