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A mineral can be defined
As a solid material, usually inorganic and crystallized, possessing
well-defined chemical composition and physical properties.
A mineral is the result of a
geological process (either terrestrial or extra-terrestrial) without direct human interference. The mineral properties are a direct consequence of the particular atomic arrangement of that mineral.
A « crystal » corresponds to
any mineral showing well-defined crystalline shapes, including edges, corners and faces (and any combination of those shapes). Mineral classification is based upon those chemical and crystallographic properties.
Did you knew it?
Minerals are the primary constituents of rocks.
Explore the Mineral Treasures of the Muséum
the Virtual Gallery of Mineralogy
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