This chemical precipitate is recognized by its concentric layering and dripstone structure. This aluminum-rich rock is an aluminum ore commonly used in ceramics, paints, paper, and other products. Large valuable deposits of kaolin are located in central and southwest Georgia. It is the principle ore of aluminum. The fine-grained nature and white color of the calcite are used in the recognition of chalk.
Individual shells are visible with a microscope.
Shell beds and reef deposits commonly form fossiliferous limestone deposits in areas of warm, shallow, clear, marine conditions. Different grades of coal reflect differences in composition and degree of alteration.