Friendship, love and loyalty are represented by this historic celtic design. A Lab Pink Sapphire claddagh ring with your birthstone or favorite color makes it even more significant. Sapphire is the birthstone of September, and pink sapphire is a very popular gemstone in jewelry today. The bright and happy color of a pink sapphire ring is both playful and trendy. The birthstone of May, an emerald ring symbolizes the eternally returning spring. The velvety green color of emerald is a perfect match for spring and summer fashions.