From the French for 'a thousand grains', the tiny beads of a milgrain accent can add complexity and detail to a Lab Sapphire design, as well as create a vintage or antique look. Sapphire is the birthstone of September, and one of the most popular gemstones on the jewelry scene today. The deep blue color of a sapphire ring is just right for an evening out. 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.