What represents love better than the heart shape. Diamond heart pendants are a timeless and moving symbol of affection. The spirit of love is evident in the heart shape of diamond pendants. A heart is a classic choice that says “I love you” every time she looks at it and hearts come in many styles, from simple to fancy. Heart shape diamond pendant is the most popular choice for gifting that special someone. Some heart shape includes multiple colour gemstone or black diamonds; others are set with a single diamond.