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Natural Gemstones
Geologic Environment
Mineral Gemstones
Organic Gemstones
Buyer Beware
Chemical Formulas
General References


Natural Gemstones

A natural gemstone is a mineral, stone, or organic matter that can be cut and polished or otherwise treated for use as jewelry or other ornament. 

A precious gemstone has beauty, durability, and rarity, whereas a semiprecious gemstone has only one or two of these qualities. 

A gem is a gemstone that has been cut and polished. 
Diamond, corundum (ruby and sapphire), beryl (emerald and aquamarine), topaz, and opal are generally classed as precious stones. All other gemstones are usually classed as semiprecious. 

A mineral is any naturally formed homogeneous inorganic material. 

A mineralogist is a person who studies the formation, occurrence, properties, composition, and classification of minerals. 

A gemologist is a person who has successfully completed recognized courses in gemology (the science and study of gemstones) and has proven skills in identifying and evaluating gem materials. 

A lapidary is a cutter, polisher, or engraver of precious stones. 

Geologic Environment

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