* Crystalline Limestone: This falls under the category of chemical sedimentary rocks. These rocks form from the precipitation of minerals from water solutions. In the case of crystalline limestone, the primary mineral is calcite (CaCO3), which often crystallizes in a variety of forms.
* Chert: Chert is also classified as a chemical sedimentary rock. It primarily consists of microcrystalline quartz (SiO2). It forms through the accumulation and cementation of silica-rich skeletons of organisms like diatoms or radiolarians, or through the precipitation of silica from water solutions.
Let me know if you'd like more details about these rock types!
