Topaz is a silicate mineral that comes in a variety of colors, but blue topaz is one of the most popular and well-known varieties. Blue topaz gets its color from trace elements, usually irradiation and heat treatment, which enhances its hue. It ranges in shades from light sky blue to deep Swiss blue, and even London blue, which has a darker, more saturated tone.
Blue topaz is prized for its clarity, brilliance, and affordability, making it a popular choice for jewelry, including rings, earrings, necklaces, and bracelets. It is often used as a substitute for more expensive gemstones like aquamarine or sapphire due to its similar appearance.