BIRTHSTONE RING -- 925 sterling silver celtic knot love heart brithstone ring from January to December. Crystal size: 6mm. fit your finger size 6 to 12. CELTIC KNOT RING -- A unique design combining the traditional elements of the Trinity Knot with an elegant modern design - solid sterling silver with a heart shaped sparling birthstone.(January-Garnet. February-Amethyst. March-Aquamarine. April-Diamond. May-Emerald. June-Alexandrite. July-Ruby . August-Peridot. September-Sapphire. October-Opal. November-Topaz . December-Sapphire) HYPOALLERGENIC -- 925 sterling silver as base material.plated with platinum on surface to protect it from tarnish. set with sparkling cubic zirconia. Nickle&Lead free. safe for almost all sensitive skin. WOMEN RING -- Elegant curvature Celtic Knots surrounds the love heart for a more delicate and refined look. With no visible beginning or end. eternal love will be the symbol you give to your gilrfriend. wife. mother. best friends.