MAINTENANCE INSTRUCTION Avoid water pools & spas, avoid cosmetics and other chemicals. Remove when sleeping, exercising, or doing other physically strenuous activities. After wearing the necklace, wipe it with OLD RUBIN soft flannel cloth before putting them away. If your necklace turns color then rub with a clean dry soft cotton cloth to bring back the shine. Keep your heart necklace in your OLD RUBIN box at the end of the day. Heart Cross Necklace Details Fashion design with two classic elements, Heart&Cross. It will never out of style, Cross reflects god's love in your heart! Pendent finished with 925 sterling silver plated 18K white gold Birthstone Gem: 5A Cubic Zirconia Chain Length: 18Inch/45cm Clasp type: Spring-ring clasp Read more Birthstone Ziron Color Guide There are 12 different colors of gemstones, corresponding to the birthstone of each month. You can choose the color according to the birth month. Read more Read more Surprise for Her Gift for Your mom/Grandma Memorial Friendship Read more