That is just a small, not terribly clear picture, but I think you have a point... there is a chance...
If they are old cutures akoya, you should see some nacre worn out around the holes by now. Short of enlisting a lab for help, you could sacrifice one of the smallest, damaged pearls to see what's inside. And a strong light - the kind used for estimating nacre thickness - could also reaveal the nucleus.
At least, the fellows deserve being cleaned and restrung!
If the small-graduated-strand look is not your piece of pie, these small pearls are very good for mixing with gold and gemstone beads... Gurhan, Robert Lee Morris have some styles that could fit the bill. And your version would be an order of magnitude finer because of the materials!
