SWJ0125 - Top Huge Smokey Quartz Crystal Cluster from classical Arkansas (USA) location Mineral 403g of this rare type

403g of this rare type of Carbonaceous Chondrite CV3

with an intense black color

it has several current bivalve shells attached to it

Asterotheca

Korn and Klug 2002 and Sepkoski 2002

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