Gorgeous Blue Topaz Jewelry: Historical, Current, and Prospective Many people have fallen in love with blue topaz because of its captivating beauty. Its distinctive blue hue, which ranges from the palest sky blues to the deepest seas, is evocative of the vast ocean. It is a symbol of harmony, peace, and smoothness, and its soothing vibes have made it a popular choice for jewelry. The inclusion of iron and titanium in the gem structure is thought to be the cause of the blue topaz's hue.