Ross-Simons - P - Diamond-Accented Initial Necklace in Sterling Silver. 16". RS Pure. Delicate designs and simple styles that complete every look. Who doesn't want to see their name in lights? Illuminated with sparkling diamond accents, this dainty initial necklace flashes a capital "P" in sterling silver. Stationed on a cable chain with a 2" extender. Lobster clasp, diamond initial necklace. Diamond birthstones are the perfect gift for April birthdays.