Which gem retains stable color after irradiation under normal wearing conditions?

Golden beryl is known for its stability in color after exposure to irradiation under normal wearing conditions. This stability is due to its robust crystalline structure and the nature of its coloration, which does not alter significantly under typical environmental factors such as light, heat, and humidity.

Unlike some other gems, which can experience changes in their appearance due to exposure to different conditions or treatments, golden beryl maintains its vibrant hues over time, making it a reliable choice for jewelry. Factors that contribute to this stability include its chemistry and how the color is generated within the crystal lattice. Thus, golden beryl stands out as a gem that can be confidently worn without the concern of color degradation from typical wear and exposure.