The more jadeite is worn, the more purple it becomes, which is usually the result of the interaction of many complex factors. This phenomenon may be related to the following factors:

Light and environment: The color of jadeite will be influenced by light and environment. When you wear jade jewelry, it will be exposed to different types of light, including natural light and indoor lighting. These different lighting conditions may make the color of jadeite appear different. Emerald may look more purple in some light.

Skin and sweat: Contact with skin may also affect the color of jadeite. Chemicals in human sweat may react with elements in jadeite, resulting in color change.

Quality of jadeite: The color of jadeite will be influenced by its own quality and composition. Some jadeites may have purple components themselves, while other types of jadeites may have purple tones under certain conditions.

Chemical treatment: Some jadeites may be chemically treated to enhance their color. This treatment may lead to color changes, including purple.

Please note that the color change of jadeite is a complex subject, involving many factors, including its own characteristics and external environment. If you own jade jewelry and notice the color change, you can consult a professional jewelry appraiser or jewelry expert for more detailed information and identification.