These are back catches featuring 7mm genuine pearls embedded in K18 gold. They're quite unique, aren't they? Since the catch part is 18K gold, they're safe for those with metal allergies. You can use them as back catches for your existing 18K gold earrings. Stamped with K18. - Material: Genuine Pearl - Design: With 18K Gold Fastening - Color: White Please note: This is not an earring, but an "earring catch." It cannot be used as an earring on its own. Thank you for viewing.