One interesting fact about blue topaz is that most blue topaz gemstones available in the market are actually color-enhanced through a process known as irradiation and heat treatment. Natural topaz typically occurs in shades of colorless, yellow, or brown, but through these treatments, colorless or pale yellow topaz can be transformed into vibrant shades of blue. The irradiation process alters the crystal structure of the topaz, introducing defects that absorb certain wavelengths of light and result in the blue coloration. Subsequent heat treatment stabilizes the color, ensuring its durability and permanence. This treatment method has allowed for the production of a wide range of stunning blue topaz gemstones that are popular choices for jewelry.
