Noice Nodules 😺 Chalcedony 🇵🇭

A **chalcedony nodule** is a type of geological formation where chalcedony, a form of microcrystalline quartz, forms inside a cavity or nodule in a host rock. Chalcedony nodules are often found in sedimentary rocks such as limestone, shale, or basalt. Over time, silica-rich solutions flow through the rock, filling cavities and forming the smooth, rounded nodules of chalcedony.

These nodules can range in size from small pebbles to large, spherical masses, and the chalcedony within can be translucent to opaque with various colors, including shades of white, blue, gray, and brown. Some chalcedony nodules can have striking patterns or banding, making them highly prized by collectors, especially when the nodules are cut and polished into gemstones or ornamental objects.

The formation process of chalcedony nodules involves the slow deposition of silica from groundwater. Over millions of years, the silica precipitates and solidifies inside the cavity, forming the nodules with a smooth outer surface, which is often a distinguishing feature.

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