This is an open ring featuring a natural lapis lazuli rough stone cabochon and an antique finish on S925 silver. Color: A rich and pure imperial blue/royal blue, deep and full in hue, representing the pinnacle of lapis lazuli's hue. Accompanying minerals: The cabochon contains natural pyrite, a hallmark of natural lapis lazuli, adding to the stone's dynamism and distinctiveness. Shape: Retaining the natural, free-form shape of the lapis lazuli, without excessive polishing, maximizing the natural texture and raw beauty of the mineral. Material: Standard S925 sterling silver (925 stamp visible on the inside of the band), thick and substantial, with a stable structure. Cabbage size: Approximately 16.2*18.7mm