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Learn how to get started with the International Gem Society’s guide to gemstone identification.

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How to Use the Gem Price Guide

  • 1.What are these prices based on?

    The values listed are based on a variety of sources, including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers.

    A faceted gem's price is based on an evaluation of its physical and optical properties. These are often referred to as the Four Cs — color, clarity, cut, and carat (weight). However, despite well-established grading systems for color, clarity, and cut, any evaluation of these properties is inherently subjective. Even gemologists and appraisers may disagree about the quality of a specific stone, so disagreements regarding gem prices do occur.

    Ultimately, the price of a gem is what one willing buyer and one willing seller can actually agree upon. Our gem price guide is just that — a guide. Keep in mind that gems are sold outside these price ranges every day. See our article on pricing faceted gems for more information.

  • 2.Why do I see such large price ranges?

  • 3.Are these prices for mined or lab grown gemstones?

  • 4.Why don’t you include prices for white diamonds?

  • 5.What do clarity grades like "VVS," "VS2," and "SI2." mean?

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