From the French for 'a thousand grains', the tiny beads of a milgrain accent can add complexity and detail to a London Topaz design, as well as create a vintage or antique look. 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.