Stone processing that occurs by subjecting any rock TYPE-rock sediments, rocks, stones or another akni variables that are older than the rock to a different temperature and pressure conditions than those in the original rock was created. This process is called metamorphism; meaning "a change in the format," he said. The result is a profound change in the physical and chemical properties of rocks. The stone was originally known as the protolith are converted to other mineral types or else into other forms of the same minerals as well as by the occurrence of crystalline. temperature and pressure required for this process are usually much higher than that found in the surface world. Higher temperature. 150-200 degrees Celsius and a pressure of 1500 bar stone up 27.4% variable. of crust by volume.
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