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Earth Science - Minerals of the Earth's Crust

Across
Minerals that contain a combination of silicon and oxygen.
The way a surface reflects light.
The tendency of some minerals to break unevenly along curved or irregular surfaces.
The smallest part of an element that has all the properties of that element.
The ratio of an object's density to the density of water.
A substance made up of two or more elements that have been chemically combined.
Minerals that do not contain a combination of the elements silicon and oxygen.
A naturally-formed, inorganic solid with a crystalline structure.
The color of a mineral in powdered form.
Pure substances that cannot be broken down into simpler substances.
Down
Refers to a mineral's resistance to being scratched.
The returning of land to its original state after mining is completed.
The removal of minerals or other materials at or near the Earth's surface.
The removal of minerals or other materials from deep within the Earth.
A mineral deposit large enough and pure enough to be mined for a profit.
Solid, geometric forms of minerals produced by a repeating pattern of atoms that is present throughout a mineral.
The tendency of some minerals to break along flat, even surfaces.
A measure of how much matter there is in a given amount of space.