1.6" Polished Warring States Agate Nodule Pair - China

This is a beautiful nodule of "warring states agate", collected from the Xuanhua District of Hebei, China. The nodule was carefully removed from the host rock and has been cut and polished to a glossy finish. It displays a quartz/chalcedony exterior with an interesting variety of minerals along the edge and at its center. Both halves of the nodule are included.

Agate is a variety of microcrystalline quartz (chalcedony) that displays translucence and, in some cases, banding. Agate primarily forms when silica-rich fluids fill pockets within rocks and/or fossils, depositing the silica along the walls of the rock. This process can result in banding patterns, as the compositions and impurities of these depositing fluids change over time. These banding patterns can either form as flat layers, creating linear patterns known as waterline agate, or as rounded layers, forming more common ring-like patterns. These patterns depend on the surfaces available for deposition.
Chalcedony var. Agate
Xuanhua District, Zhangjiakou, Hebei, China
Nodule Half Measurement: 1.6 x 1.5 x .9"