Quality marked "14k" on Omega Clip. Acid tests 14k yellow gold. Maker's Mark: TIFFANY & CO. Check out my other items. Be sure to add me to your favorites list. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Earrings". The seller is "margaford" and is located in this country: US. This item can be shipped worldwide.