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Things to Know Before Buying a Diamond

A World of Diamonds at Zemil's

What exactly is a carat?


The weight of a diamond is measured worldwide by a standard unit: the carat. The name “carat” comes from the seed of the carob tree native to Mediterranean regions, once used to weigh stones. A carat weighs 0.2 grams.

What is the GIA? What is a GIA certificate?


The GIA is the Gemological Institute of America, an independent laboratory respected worldwide. Each stone over 1 carat receives a certificate (“identity card”) attesting to the quality of the stone (4 Cs) and details its properties.

Compromise Carefully



A diamond’s cut is what unleashes its light. The GIA calculates the proportions of those facets that influence the diamond’s face-up appearance to evaluate how successfully a diamond interacts with light to create desirable visual effects . The cut scale ranges from “Excellent” to “Poor”.

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