Professional guide to gemstone prices

Gemval is the first online gemstone valuation resource for industry professionals. Our statistical database is updated every month and contains more than 50000 records from over 130 traders. To ensure our valuations remain unbiased, we don't buy or sell gems, nor are we affiliated with any jewelry merchants. Gemval has been used as an online pricing reference by professional web traders, jewelers and collectors since 2004.

Gemval provides you with a simple online tool for fast and accurate gemstone appraisal. Most natural colored gemstones can be valued using our 3-minute interactive model. To arrive at the value, the sophisticated statistical model takes into account the many factors impacting on a gems worth, such as its variety, weight in carats, color, color intensity and clarity amongst other characteristics. The value calculated in the model reflects current web market prices.

It is easy to use: to estimate the value of your gem right now, you just need to have it in front of you, and be sure of its variety and weight.
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Gemstone color grading

The color grade matrix is the core of the Gemval online appraisal system. It consists of 230 color patterns, 25 base hue sets + grey scale, extended by 6 tones (very light, light, medium light, medium, medium dark, dark) and by 3 saturation grades (strong, very slightly greyish/brownish, slightly greyish/brownish).

Historical prices and Gemval Aggregate

We have monitored the historical prices for natural gemstones since 1st July 2005. The Gemval Aggregate index (GVA) is updated and published monthly, on the base of calculated values and past statistics. GVA reflects the overall pricing trends for natural colored gemstones.

Historical data charts

Gemval Aggregate index

Weight distribution analysis

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Featured resources

GemsDB.com: The World's largest online database of natural gemstones. Hundreds of dealers have listed their stocks with us.

Diamondse.info: Weekly updated diamond pricing trends and diamond grading reports. A searchable database of diamond prices from online jewelers.

ITC's Market News Service (MNS) provides detailed price information and market intelligence on selected products.