London Blue Topaz Jewelry in Sterling Silver: Flaunt Your Style Flaunt your style with mesmerizing London blue topaz jewelry in sterling silver. London blue topaz is a stunning gemstone that is different from other gemstones of topaz due to its beautiful shade of blue. It contains a very fascinating tone of blue, which is darker and inky in comparison to other topaz gemstones. Hardness and the mesmerized blue color of London blue topaz are the two attributes that make this gemstone important and valuable.