Swiss blue is an intense blue color range of topaz, that is verily described as vivid, electric or super blue. Some of the most vivid shades of Swiss blue topaz can be compared to the rich colors of the Caribbean Ocean.It’s no wonder it is so well liked; it is gorgeous and affordable.Topaz is one of the hardest of all gemstones. With a hardness of 8 on the Mohs scale, it takes a superior polish and gives a beautiful luster. Flawless by nature, Swiss blue topaz is naturally beautiful.