Overseas Diamonds Technologies

Sarin Color Technologies Ltd.

Dave Lapa

Marc Frans Alida Van De Velde

Christiaan Louis Cecile Keersmaekers

A method of capturing data for gemstone analysis is provided. The method includes capturing images of the gemstone under differing lighting conditions, and comparing the captured images.

Apparatus for generating data for determining a property of a gemstone and methods and computer programs for determining a property of a gemstone

An apparatus for generating data for use in determining a property of a gemstone, such as a cut diamond with a support structure for supporting a gemstone placed at an observation position, the support structure being arranged such that, if the gemstone has an axis of symmetry, the gemstone is supportable such that the axis of symmetry is parallel to an axis X passing through the observation position; an illuminator arranged to illuminate a gemstone so placed with a spatially varied light pattern; a rotator arranged to cause relative rotation between the light pattern and the support structure generally about the axis X; and a camera arranged to capture, at each of a plurality of rotational positions, an image of light returned by the gemstone and to output said images as image data.

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Antwerp, Belgium

Dave Lapa