This thread is for asking questions about specific Rocks and Minerals.
It will consist of someone posting a picture of a rock or a mineral, or posting any question regarding to this event. People will post their guesses here (preferably you should hide your answer) - if they are right, it becomes their turn to post.
You have a magma that is at very high temperature and pressure.
What minerals would the rock formed from this magma have if it was intruded into the earth?
What minerals would it have if it was extruded onto the surface of the earth?
What would be the difference in these rocks?
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