Sterling Silver Smokey Quartz Earrings - 7.27 Carat Gemstone Weight in Sterling Silver - Width of Item: 13 mm - Length of Item: 13 mm - Earring Closure: Post & Push Back - Earring Type: Stud - Finish: Polished - Feature: Solid Polished ; Post Earrings - All of our jewelry for women and men are authenticated with a 10K or 14K hallmark and are tested to pass FTC regulations. ::: [ Potential Enhancement Methods: smokey quartz ] - Usually dyed and/or heat treated to produce different colors. Sometimes surface enhanced with a coating to enhance color. ::: [ Care and Handling: smokey quartz ] - Avoid abrasives, harsh chemicals, steam, and ultrasonic cleaning. Clean with warm soapy water and a soft brush or cloth. :::