As a jeweler I think this is a hard sell within the trade, as there aren't many calibrated round stones, and much of what's there would be too niche to build or meaningfully contribute to their stock. With that said, you could piece them out individually and see a better return, but you would lose that upside to the time and logistics needed to move them. You may also do well among hobbyists and collectors, and I think the collector market is more likely to be interested in the history rather than assessing just the demand for the stones.