Abalone Shell Pendant Necklace and Chain. This Upscale Designer Abalone Pendant accented with a CZ, measures 3 inches long including 7mm bail and 1.75 inches wide. The silver chain is included and measures 18 to 21 inches (including 3 inch extender) long with lobster clasp. Rhodium plated anti tarnish finish. What a great addition to your unique Designer Jewelry Collection!