The Herkimer Diamond Stud Earrings are that effortless conversation starter you'll love explaining... naturally double-terminated quartz crystals that sparkle with raw, organic beauty, and because every stone is one-of-a-kind, your pair is entirely yours. Hypoallergenic, waterproof, and stunning enough to wear every single day. • Materials: Crafted with high-quality .925 Sterling Silver or 14k Gold Filled materials (no plating)• Size: Stones measure approximately 7-8mm• Includes upgraded locking ear nuts for a secure fit• Hypoallergenic, waterproof & tarnish resistant - perfect for everyday wear• Comes gift wrapped in our signature B&L box, ready for gifting• All jewelry includes a complimentary polishing cloth to help you keep your items looking shiny and new