Shop Ritani for vibrant sky blue topaz rings. Blue is the most popular shade of topaz, and there are two blue topaz variations. London blue topaz is known for its darker, deeper blue hue, whereas Swiss blue topaz is lighter and paler. Much like diamond cuts, different shapes of topaz will evoke different styles in your ring. A blue topaz cushion cut ring will appear vintage, but a round or princess cut blue topaz ring will look more modern. Are you planning on giving a blue topaz ring as a gift, but you don't know the recipient's ring size? All you need is our free ring size chart and a ring from their collection.