These are Basra, total market value just under 2 million US $
What are the stones in the necklace? And what is the karat of the gold?
Yes, that is what I was getting at. If the karat of the gold is high and the stones are diamonds, then there's a good chance the pearls are Basra, too. However, just because the metal and stones are real doesn't mean the pearls haven't been swapped out for less expensive freshwater pearls.
Since we cannot tell from the photo, your would need to have a lab test the pearls.