The Royal Heirloom Necklace is a collar accessory that can be bought from the Seaside BARC for $1,000 once it has been unlocked with 10,600 Owner Points or by playing for 33 days.
Description
3DS NTSC: "This magnificent necklace is draped with priceless gems."
3DS PAL: "An old and magnificent necklace, arrayed with radiant gems."
Gallery
Precious from Café Petrov wearing the Royal Heirloom Necklace.