Shamrock Necklace Sterling Silver & Connemara Marble Choose Chain Length Sterling silver shamrock necklace measures approximately 7/8" tall x 3/4" wide. Crafted with sterling silver and Connemara marble for a nickel and allergy free pendant. Available on a custom 20 sterling silver heavy chain with a lobster claw clasp for easy use. Made in Co. Dublin, Ireland by Solvar and hallmark stamped at Dublin Castle.