Size of this ring is easily adjustable by hand. Select your size for men (15 to 30 ) and for women (6 to 14). Natural Amethyst Sterling silver ring is artistically made according to the astrological needs. Gemstone is left open from the back side for rays to pass through and reach finger properly. High quality making in our own state-of-the-art manufacturing unit gives ring a beautiful look. Gemstone certified by a govt recognised laboratory. Sterling silver is 92.5% Pure silver. Silver used is Hallmarked by BIS and stamp of hallmark will be on the ring itself.