Purchased a few years ago and need help with ID?

[rsparks]

Any information on these would be great! I’m not sure what I have other than they were sold to me as authentic, measure 9.5-10mm, and have a W on the 14k clasp.

 

[Pearl Dreams]

Can you please post a photo of the entire strand on a white background?
Also-- "authentic" what, exactly? Freshwater? Saltwater?