This Mercury in Retrograde Necklace is designed to protect and support you during this time. Yet, we don't want you to see Mercury in Retrograde as something to dread. As you wear the necklace and touch the protective and cleansing Black Tourmaline, may it be a reminder that inside every potential crisis is a lesson, a truth, waiting to be discovered. Seven 4mm faceted round Black Tourmaline gemstone beads, bookended by tiny raw brass heishi beads Strung on black Mighty Miracle Cord Necklace comes in one length, 16" with a sterling silver extender allowing it to be worn up to 18" FSC Certified Card SoulKu offers genuine gemstone jewelry handmade in the USA.