The gemstone most commonly associated with love is the diamond. Diamonds have been cherished for centuries, symbolizing eternal love and commitment, particularly in the context of engagement rings. Their brilliance, rarity, and durability contribute to their association with deep emotional connections. The tradition of giving diamond rings dates back to the 15th century, gaining further popularity in the 20th century through marketing campaigns that emphasized their significance in romantic relationships. Today, diamonds are not only seen as luxury items but also as deeply meaningful tokens of affection and devotion, making them the quintessential symbol of love.