Abella Blue Silver Necklace with Larimar? Stone

Elegant necklace featuring 3 silver patterned plates with one small light blue mottled stone. Don’t think the plates are silver, but another silver colored metal. The tiny stone looks like larimar?or other stone? to me. Perfect for adding a unique touch to any outfit. Gently used with some tarnish on plates. I did not clean. Nice chain adjustable from about 17 to 19.” Tagged Abella Blue. Last photo shows wear at top on the black recessed area.