Welcome to the future of opal:
Gemmological Digital Analyser (GDA)™ objective opal grading technology.

O.P.A.L contracted CSIRO to carry out image capture analysis and software engineering and now O.P.A.L has incorporated this knowledge into the GDA™ for defined opal characterisation.

The GDA™ incorporates advanced and world-leading technology in robotics, optical light analysis and innovative software programming to achieve precise and objective colour measurements and evaluation of each precious opal.