You can determine if a stone is real natural marble by conducting a few simple diagnostic tests, such as performing an acid scratch test, checking for temperature, and examining light transmission. Real marble is composed of calcium carbonate, which will fizz and bubble slightly when a drop of mild acid like vinegar or lemon juice is applied to an unpolished hidden edge. Real marble also feels consistently cool to the touch, exhibits unique non-repeating natural veining, and can be scratched with a steel blade.
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