Science & Technology Museum, University of Patras campus, Greece
My name is "Quartz". I am composed of the elements silicon and oxygen.
I am one of the most common minerals, the second most abundant in the Earth's crust and only a few other minerals are harder than I am. I appear in many rocks because I form in all geological environments. My name is due to the similarity of the color of milky quartz with hail. I exist in several varieties, which take their name from my color, or form.
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