Reserved. Opalescent sea glass heart & sterling silver pendant.ne of a kind pendant composed with genuine opalescent sea glass from Seaham . The sea glass is set in fine silver backless bezel, the chain is sterling silver. I've shaped this piece of sea glass myself. Necklace size: The pendant is approx. 2. 4 cm long ( 3. 56 cm with the bail) and 2 cm wide. The chain is 20" (50 cm). For some "behind the scenes" action, you are welcome to visit my Instagram page, a place where I share my daily beach finds and where