Friendship, love and loyalty are represented by this historic celtic design. A London Topaz claddagh ring with your birthstone or favorite color makes it even more significant. The birthstone of December, the intense deep blue color of a london blue topaz ring can evoke thoughts of warm Caribbean nights. Gem of hot summer nights and steamy red sunsets, ruby is the birthstone of July. Show the world the passions within you with a fiery ruby ring.