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How do You describe The Color of A Gemstone To An Internet Customer?
This important question may now have an answer, reports Reed Business Systems.
How do you describe the crisp green glow of an emerald or the complex interplay between colors in a ruby?
Each gem is unique, so words cannot paint an accurate picture, and digital photographs do not capture their color accurately. Now a technique to describe and record a jewel's exact color has been developed by Menahem Sevdermish of gem software company GemEwizard, based in Ramat Gan, Israel.
The technique should vastly improve the buying and selling of precious stones online, and could also help to spot stolen gems. "It's like the fingerprint of the stone," he says.
Diamonds are commonly traded online because their vital characteristics, including tint, clarity, cut and carat value, are easily described. Gems are different, says Richard Drucker, a gemologist in Northbrook, Illinois. "We just say 'slightly purplish, medium tone.' It's very vague."
To record a gem's color, Sevdermish scans it in a white box using special lighting. Computer software then splits the image into thousands of spots, like pixels, and measures the hue, darkness, and color intensity of each. This numerical description of the gem at each spot forms a unique color map.
An online seller could scan a gem and email its map to a buyer, who could use Sevdermish's database of 150,000 fingerprinted gem images to show the closest match on screen or compare the fingerprint with the details of a lost or stolen jewel.
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