GSI Opens New Lab in Botswana

Gemological Science International (GSI) one of the largest independently owned gemological laboratories in the world, announced recently that it opened its 9th lab in Gaborone, Botswana.
“After decades of just mining rough diamonds, Botswana's capital Gaborone now cuts, polishes and sells the diamond which creates a demand for gemological laboratories and education” according to Mark Gershburg, CEO of GSI.  More

The EPAG Basic is our new developed tabletop unit for electropolishing of 9 kt-22 kt yellow-/red- and white-gold.

The technical data are:

•  1 process container, made of graphite solid, with PP-plastic cover, bath volume appr. 3,5 l

•  1 rinsing bath with outlet, made of PP-plastic, bath volume appr. 8,0 l

•  1 drain tray, made of PP-plastic

•  1 standard piece holder with 10 hooks, base material: titanium (isolate), with contact tip made of titanium

•  1 rectifier 30 V / 30 A, manual adjustable
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ImaGem is proud to announce that it has advanced diamond color grading technology to achieve accurate and repeatable grading of diamonds with a secondary hue. This is a major breakthrough achieved recently by Dr. Lalit K. Aggarwal who has worked on this problem for the last 20 years.

ImaGem can now grade diamonds with secondary hues such as brown, gray and other hues, two toned diamonds, and colored diamonds. This can be done on-site with the newest version of ImaGem’s integrated diamond grading machine GL3200.

The GL3200 is part of ImaGem's strategy to provide latest technology to the diamond industry for on-site grading. The Grader machine (seen on the right) has a footprint of 12 inches x 24 inches and a capacity of grading 2400 diamonds a month.

The GL3200 Grader machine grades color, fluorescence, light behavior, proportion analysis, symmetry and alignment for round as well as fancy shapes. The loading in the machine is done by a robotic arm and the entire grading process is automated.   More