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Minerals - A to Z Minerals by Color
A
mineral is a naturally occurring, inorganic element or compound with a definite
chemical composition, a characteristic crystalline structure, and distinct chemical
properties. The study of minerals is called mineralogy. It includes mineral identification
and description, the classification of mineral groups, and the study of mineral occurrences.
Gems are substances that have economic and
aesthetic value. Most gems are minerals. However; some
gems are organic substances such as amber, while others
are rocks. Professionals who specialize in the study of gems
are called gemologists.
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