A Unique 3" resin starfish with sand from Horseneck Beach in Westport MA but you can choose sand from more than 200 more beaches worldwide to customize your necklace.
https://www.anniemara.com/lovethisbeachcollection
Neckwire is a 17" memory wire with silver plated tubes and  wooden beads and a lobster claw clasp and 3" extender.
 
When the silver plating tarnishes, clean it with toothpaste, silver polish will remove the finish.