Necklace Chunky Stone & Freshwater Pearl NWOT

NWOT Chunky Stone & Freshwater Pearl Necklace Blue, white and a touch of brown I purchased this at a local boutique a couple years ago and never had an occasion to wear it…the boutique was a “beachy” store. I believe these are stones and fresh water pearls based on what I paid for it. Also, I’m pretty sure the clasp and chain are sterling silver….I just cleaned them with silver cleaner. I don’t have any paperwork so I don’t want to guarantee anything. Great condition