My quick review on the SSEF course.
the course is just as described, introductory, and hits the right level for people who may be new to pearls, or working in a retail shop selling pearls and jewellery.
The material is presented clearly, except for the trick question with Swiss Francs, and shouldn’t overwhelm the participant.
As a primer type course, I could see this being the seed from which further interest in pearls could grow.
And even for people with experience/prior learning, there is often a golden nugget or two of information that might have slipped from memory, or not come to your notice beforehand.