Rapaport News



Rapaport Broadcast
Martin Rapaport Addresses Israel Diamond Week
February 12 2020

Advanced search
Latest Articles
Rough Markets
Polished Markets

Sarine Claims Superior Accuracy for Grading Tools

Algorithm scores diamonds more consistently than reference group of gemologists.
Jul 31, 2017 8:40 AM   By Joshua Freedman
Print Print Facebook Facebook Twitter Twitter Share Share

RAPAPORT... Sarine Technologies’ new automated color- and clarity-grading systems are yielding more reliable results than manual graders, the company has claimed.

Sarine Clarity, which uses technology to analyze flaws in polished diamonds, showed a 97% correlation with the grades given by a reference group of human gemologists, while Sarine Color matched them 99% of the time, Sarine said Sunday.

The company found that humans tended to give a wider range of grades for an individual diamond than the technology did. Sarine based its accuracy rates on the distribution of those grades. For the reference group, it chose gemologists who had all worked at the same laboratory, and every time two or more of them gave a diamond a score that was more than one grade off the average, researchers recorded an “error,” explained Roni Ben-Ari, Sarine’s vice president for products.

Such errors occurred with human-graded stones 7% of the time when it came to clarity and 3.5% for color, if the diamond was not fluorescent, according to the company.

Manual graders get the color wrong even more often when diamonds are fluorescent, Sarine asserted. In addition, about 10% of clarity-grade results are disputed, it said.

By comparison, Sarine’s technology deviated from the human group’s average grades in only 3% of cases in the clarity category, and only 1% in terms of color. Sarine expects to refine the machines’ accuracy over time through self-teaching algorithms, with the aim of cutting down error rates to less than 1% for both categories.

“Introducing technology for the comprehensive 4Cs grading at an unmatched level of accuracy, consistency and reliability will take the consumer’s confidence to an all-new level,” said Sarine CEO David Block.
Tags: Automated Clarity Grading, automated grading, David Block, grading, Joshua Freedman, Rapaport News, Sarine, Sarine Clarity, Sarine Colour, Sarine Technologies
Similar Articles
Benny LandaTech Pioneer Sees Future for Synthetics in Israel
Jan 02, 2020
Israel has an opportunity to forge a new specialism in diamond synthesis as its...
Alrosa Collaborates on WeChat Blockchain
Can Nanotechnology Save the Diamond Trade?
Comments: (0)  Add comment Add Comment
Arrange Comments Last to First

Call Us: 1-702-893-9400
Member License Agreement   RapNet Trading Rules & Code of Conduct    Privacy Policy  
twitter twitter
About Rapaport
Advertise with us