Madewell Mother of Pearl Star Necklace. Carved from shimmery mother of pearl (an iridescent material that occurs naturally in some shells), this sweet little star charm hangs from a delicate chain necklace. Approximately measurements: Length: 16" with a 3" extender chain for adjustable length.Gold-plated sterling silver, pearl oyster, cubic zirconia. Spring clasp closure. Excellent conditions. Brand new with tag