LEO is a portable desktop diamond verification instrument for loose and mounted stones, designed to separate diamonds from synthetic diamonds and diamond simulants. Leo is manually operated but gives an automatic test result.
The performance metrics shown below are based on testing done in 2019 using the ASSURE 1.0 test standard and sample sets. The LEO has not been tested under ASSURE 2.0.
The LEO was purchased by the Natural Diamond Council and independently tested.