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The two most abundant elements in Earth's continental crust are _____. oxygen and silicon Which major non-silicate rock forming mineral is the primary constituent of the rock limestone? calcite Which of the following is the least abundant of the eight rock forming elements that make up most of the continental crust? iron; oxygen; aluminum; calcium; magnesium
Rock vs Mineral. A mineral is a solid formation that occurs naturally in the earth while a rock is a solid combination of more than one mineral formations which is also occurring naturally.A mineral has a unique chemical composition and is necessarily defined by its crystalline structure and shape. rock can also contain organic remains and mineraloids apart from regular mineral formations. There are some rocks that may include just one mineral formation though. The commercial value of minerals is immense and rocks are mined to extract these minerals.