Here is the rewritten description in a single paragraph under 400 characters: This exquisite diamond heart necklace expresses everlasting love. The simple heart element features a natural diamond center stone, making it sparkle beautifully. Crafted from high quality, safe S925 sterling silver, it is nickel-free, lead-free, cadmium-free, and hypoallergenic for comfortable wear. The pendant measures 22mm by 20mm and weighs 4.1g. Its versatile design pairs perfectly with daily outfits and suits any occasion. An ideal fine jewelry gift for her, conveying heartfelt affection with the message "always in my heart". Perfect for birthdays, Mother's Day, Valentine's Day, weddings, engagements, and more. A meaningful gift for grandmother, mother, daughter, wife, best friend, sister, or children aged 12 and below. We provide this special jewelry as a lasting reminder of your love.