0.788ct. Petalite Solitaire Stud Earrings in Platinum Overlay 925 Sterling Silver Hallmarked 925 solid sterling silver with a platinum overlay Petalite Round 5mm Diamond Cut 0.788ct Approx. 0.6cm top to bottom Push backs for security Petalite is a rare colourless gemstone that is a real favourite with collectors around the planet. These pretty natural gemstones are perfectly sized for daily wear