Agate Nodule Cut!

An agate nodule is a type of geological formation where agate, a variety of chalcedony (which is a microcrystalline form of quartz), forms within a nodule. Here's a more detailed explanation:

Formation: Agate nodules typically form in volcanic rocks, especially in cavities or vesicles left by gas bubbles in lava flows, or in sedimentary rock layers where silica-rich solutions seep into voids or around organic matter. Over time, these solutions deposit layers of silica, which eventually harden into agate.
Structure:
Nodule: The term "nodule" refers to a rounded mass embedded in rock. In the case of agate, the nodule often has a concentric or banded appearance due to the way silica layers are deposited.
Bands: Agate nodules are famous for their colorful, concentric bands, which can vary widely in color due to different mineral impurities present during formation.
Appearance: Agate nodules can be quite varied:
External: Often, the outside of the nodule is less colorful, sometimes covered by a layer of rough,