For my particular taste, this is one of the nicest pieces out of Peter Bancroft collection from sheer interest value, price and history aside. In an ancient basalt flow there were gas vesicles that filled with quartz and other species; in this case, goethite. Once the basaltic rind eroded, this geode remained. A druse of colorless quartz is the host for several diverging and radiating, lustrous, black, metallic clusters of goethite, to 2.0 cm in length. The goethite, thankfully, is not contacted against the upper wall of the geode and the crystal sprays are freestanding!. As I said before, this is super! And it can be shipped, which is not the usual case. The tunnel full of geothite sprays goes all the way back in, and its much better in person, as you can guess! 10 x 7.2 x 7.2 cm