TOUS Garden of Love LGG Ring with 18kt gold plating over silver and heart-cut synthetic sapphire. Gemstone size: 9 mm. Ring thickness: 1.8 mm. It is made of sterling silver with 18 to 23 kt gold plating and has a thickness of 3 microns. This quality guarantees a greater durability of the jewel. Note: Piece created with laboratory-grown gemstones.