Can you attach a photo with the clasp as well? With a close up of the clasp front and back. Are there any metal marks indicating the kind of metal? 14k, 585, 925 etc.
Also, the pearls near the center appear to be oval rather than round, but that could be distortion from the camera. We sometimes see that near the edge of a photo. Are the pearls all round? Do they graduate in size, as they appear to?
I don't see any flaws. Can you examine the pearls and take a close up of any flaws you see in the surface?
If there are no flaws visible anywhere, not even pinpricks, they could be fake.
If off-round, they could be freshwaters.
If some blemishes and all perfectly round, they could be akoyas.
It helps to have all the information.