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403g of this rare type of Carbonaceous Chondrite CV3
Korn and Klug 2002 and Sepkoski 2002
P27 - Whole NWA Chondrite Meteorite Cut Into Two Halves 108
Cephalaspis was thought of as being a bottom-feeder
SWJ0125 - Top Huge Smokey Quartz Crystal Cluster from classical Arkansas (USA) location Mineral 403g of this rare typeThis is a gorgeous smokey quartz crystal cluster that was collected from the classical Arkansas location. Top quality cluster. Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 siliconoxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. There are many
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