Answer :
Chert and limestone are both sedimentary rocks, but they have different characteristics that can be used to distinguish between them. Here are some ways to tell - Hardness, Color, Texture, Acid reaction and Composition.
Chert and limestone are both sedimentary rocks, yet there are ways to tell them apart thanks to their various features. Here are various methods for identifying the different samples:
- Chert is a tougher rock than limestone in terms of hardness. While limestone is softer and more susceptible to knife scratches, it may scratch both glass and steel.
- Chert normally has a dark colour, ranging from black to dark grey to brown; limestone, on the other hand, can have a variety of hues, including white, cream, tan, and grey.
- Texture: Limestone can have a variety of textures depending on how it was created, whereas chert has a fine-grained, smooth texture that occasionally seems waxy or glassy.
- Limestone will fizz when exposed to acid (such as vinegar), while chert will not.
- Calcium carbonate (CaCO3) is the main component of limestone, whereas silica (SiO2) is the main component of chert.
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