The diamond colorimeter made its debut in 1977,
when the Israeli scientist, Mr. Zvi Yehuda, introduced his new and revolutionary
model “A1 EA”, which was able to accurately predict the true color of a polished
diamond from its rough predecessor. Since then, thousands of machines have been
sold worldwide, allowing diamond dealers and businessmen to know the true value
of their rough diamonds.
Mr. Yehuda, however, did not rest on his laurels, and continued to push the
technological envelope further and further, culminating in his greatest achievement
so far, the “F” model. The “F” model, a technological marvel, features extremely
small dimensions, and a multitude of unparalleled abilities. Accurately predicting
the true color of a rough diamond, like its predecessors, the new model also detects
blue and yellow fluorescence, brown hues, and gives indication for fancy, intense or
vivid yellow, as well as finding if the diamond is a type 2A or type 2B diamonds.
An added benefit is the USB connection to the OGITender, OGIMarker, OGIScanner and
CoMarker, allowing the transfer of the color grades to the OGI rough software.