This heart-shaped bead can be made of red colored glass. The red heart represents universal love, love and passion. Most often, it is offered to one's partner. The pearl can also be made of glass with other colors: the orange heart symbolizes friendship and is offered when you think of someone and send positive energy. The blue heart symbolizes trust, peace and loyalty.... The green heart can express envy or jealousy, the yellow heart symbolizes friendship and happiness, the purple heart also symbolizes compassion and love , it is the emblem of calm, understanding and composed love, sometimes perceived as very romantic....The Black Heart expresses pain, grief and sadness mixed with love...