Hi,
I don't know anything about visual merchandising, to be honest.
Just an idea that if your fair organizer provides a large touch screen display for your booth (a digital signage) then I think that would be a nice addition to your front store to stop any nearby visitors. Provided that a simple webpage (HTML, javascript, CSS) is allowed to be setup there inside screen machine / computer / pc, I might be able to help with webpage design and code.
I think I had one similar project before, not for displaying jewellries items but to display today's weather. It had dark theme and was placed outdoor...
Relevant Skills and Experience:
HTML, javascript, CSS, image manipulation
Proposed Milestones:
$250 AUD - after project completion / acceptance
Kindly let me know...
Hendra