Gem Nation -- Glossary of Diamond, Jewelry and Watch Terms


Gem Nation -- Glossary of Diamond, Jewelry and Watch Terminology

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	AGS American Gemological Society (AGS) Laboratories is one of the leading diamond grading laboratories in the jewelry industry. The laboratory issues the Diamond Quality Document (DQD), the only report to grade on diamond cut.

	Alloy An alloy is a mixture of two or more metals formed by melting them together.

	Automatic Movement The watch is powered by the motion of its wearer. The rotor, part of the automatic mechanism, winds the mainspring every time the wearer moves his hand.