Large hollow chalcedony nodule Spider jasper Thin dark iron bands create

Thin dark iron bands create several layers of hills filled with saturated layering

making this a dramatic Halloween mineral specimen

composed of interlocking calcite crystals

indicating the cracks occurred well before the specimen was mined

but it can range into green or a bold contrast of black

Large hollow chalcedony nodule Spider jasper Thin dark iron bands createLocale: Morocco Approx size: 2 x 2 x 2" Approx weight: 232g Sometimes called "panda," truffle, womb stone, or witches wart chalcedony (hey, you dont even want to know what I was calling them), these nodules have slightly obscene looking bulbous, knobby forms in contrasting white and dark brown gray semi translucent chalcedony. The nodules are actually believed to be a fossil pseudomorph of prehistoric sponge colonies dating back to the Upper