Heat treatment of jadeite can produce which color?

Heat treatment of jadeite is primarily used to modify its color, and it can be effectively utilized to achieve a more vibrant orange hue. During the heating process, certain impurities within the jadeite can be altered, leading to enhanced color saturation. This treatment is well-known and often employed in the gemstone industry to transform the visual appeal of jadeite.

In contrast, the other colors listed, like blue, purple, and red, are typically associated with different treatments or sources of jadeite. While jadeite can occur in various natural colors, the application of heat specifically brings out more vivid orange tones, making it the correct choice for this question.