Description
Workshop “Opal Testing and Value” which focused on opal types, formation, localities, treatments, properties, grading and valuation, with a vast array of examples and time for hands-on inspection.
Travis Lejman (GAL/NAJA, New York, USA) GIA GG, has been in the industry for 20 years. He has recently taken over & continues to grow Gemological Appraisal Laboratory of America his father started in 1979.
