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ElementsThere are 108 elements, and they can be combined in so many different ways you might wonder how many minerals can occur naturally. However, although 108 elements exist, they aren´t all common - the earth´s crust is composed *mostly* of eight important elements: oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. Together, they account for 98.59% of the earth´s crust by weight.
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