From the French for 'a thousand grains', the tiny beads of a milgrain accent can add complexity and detail to a Ruby design, as well as create a vintage or antique look. 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. This birthstone of October has a luminosity and glow that makes an opal the treasure that it really is. The rainbow of colors on a neutral white background makes an opal ring a perfect match for any outfit.