This ring is made with light lime green sea glass set in a fine and sterling silver bezel cup. The ring band is made with comfortable round wire. This is genuine sea tumbled sea glass, also known as beach glass, and the irregular shape makes this stone truly unique. This sea glass is 10mm long and 7mm wide. Due to the fragility of sea glass, this ring cannot be resized and is only available in size 6. Over time, sterling silver rings will oxidize and appear to darken in color. To keep your ring clean and remove the oxidation, wipe gently with a silver polishing cloth. Do not use liquid jewelry cleaner - this risks damage to the glass.