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In addition, it must be hard and durable. Its value increases if it is also rare.The beauty of a gem is measured in terms of its clarity, brilliance, and color. Comments
Minerals can be classified into distinct groups based upon similar atomic structure and/or chemical composition. A mineral is a naturally-occurring inorganic solid with a specific chemical composition and a characteristic regular, geometric arrangement of its constituent atoms.Minerals can be classified into distinct groups based upon similar atomic structure and/or chemical composition (which is mainly based on their anions).inerals can be classified into distinct groups based upon similar atomic structure and/or chemical composition (which is mainly based on their anions).