rachel1sop, Welcome to Pearl-Guide!
You have 93 pearls (with 93 knots), pearls all one size, knotted as an endless strand. The necklace appears to be about 26-26.5 inches long, so the pearls would be around 6.5mm. They are all fairly round, with a little variation, but not eggy the way freshwaters might be (I think there is a bit of distortion in the first photo but in the second photo they appear generally round.)
They are fairly uniform in color (white/cream), size, shape, without a high luster (but it's harder to judge luster and overtones against a non-white background.)
They could be imitation. To tell the truth, that is my first impression.
It would really help if you could take a few more photos-- against a white background this time (paper towel is good). Please include closeups, especially of any flaws.
Do the pearls feel slightly gritty or smooth when rubbed very gently against another pearl?
If they are gritty, they may be real nacre (genuine pearls.) If they feel smooth, they are likely imitation pearls.
Look at the drill holes-- do you see any swirly build-up of extra nacre? That is typical of imitation pearls.
Is there any chipping away of the nacre anywhere-- near the drill holes or elsewhere? What does it look like (very thin and flaky if imitation), and what is underneath? (shiny glass bead, if imitation.)
Are the drill holes beveled at all? That would be typical of some imitation pearls (but not all.)
Finally, any history on the pearls would help (where/when you or your relative got them, price range if you know it, any documentation you have (receipts, appraisals).
