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

Opal Producers of Australia Limited (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.

Using advanced technologies in robotics, optical light imaging, analysis and innovative software programming the GDA™ achieves accurate and objective assessment of precious opal gemstones.