The Mystigrey 18K Yellow Gold Plated A-Z Initial Letter Pendant features a beautifully engraved capital letter on a 1-inch solid pendant. Its elegant design adds a touch of personalization and sophistication to any jewelry collection. 18K GOLD PLATED.All gold-plated Mystigold jewelry is plated with 18K gold. 18K gold contains 75% pure gold and 25% other metals, thus making gold stud earrings a higher quality of gold compared to 14K (which contains only 58% pure gold).