Three major classes of rock variant is based on the formation mechanisms. Intrusion of hot magma rocks around, causing temperature changes into contact-dominated. Into a pressure that occurs when sediments were buried deep under the ground and be ignited by striking a small role high temperature this is called into the bodies, and it can cause stones, such as jade, that both the heat and the pressure to play the role of this mechanism into regions called often are found in the mountainous area of the building.
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