Being recently laid off and not sure when I'll go back to work I'm looking at this from a business standpoint so am collecting all the ideas and info I can for outlets.
To get the best return I think
something like this might get the highest sell price. Its just a matter of whether or not you have the time and means to set it up with a trusted partner or two. I would make one dedicated room for the baubles and keep a person at the door with a cash register.
'You pay for it before leaving the room bub.'
Other than that consignment for the really nice stuff. This company wants to keep it for 6 months but only charge 10% fee if it sells.[/url]
Maybe a local auction house if you don't mid the higher fees and risking a low ball sale price if they don't offer a reserve option. I personally would not sell without a reserve price but some auction services refuse to set them.
Just a note: For bigger diamonds/stones a GIA report with an appraisal goes a long way to getting the best price but then you're looking at some fees. Neither of these services offers appraisals, only certification of quality. However UGL does offer trusted third party appraisals by UGS.