If your jade bracelet has changed color, there could be various reasons for it. Let's look at some possible causes and what you can do about it.

1. Exposure to chemicals or strong sunlight: One common reason for a jade bracelet changing color is exposure to chemicals or prolonged exposure to strong sunlight. Chemicals found in cleaning solutions, perfumes, or even soaps can react with the minerals in the jade, causing it to change color. Similarly, excessive sunlight can cause the jade to fade or discolor. To prevent this, avoid wearing your jade bracelet while working with chemicals or swimming, and store it in a cool and dark place when not in use.

2. Natural color changes over time: Another reason for the change in color could be the natural aging process of the jade. Over time, jade can develop a patina, which is a subtle change in color brought on by exposure to natural oils from your skin and external elements. This patina can enhance the beauty of the jade, so if your bracelet's color change is due to this, it may not be of concern. However, regular cleaning and care will help maintain its appearance.

3. Poor quality or fake jade: If your jade bracelet was not sourced from a reputable seller, there is a chance that it may be of poor quality or even fake. Some stones may be treated or colored to imitate the appearance of genuine jade. If you suspect this, it may be worth consulting with an expert or a trusted jeweler to verify its authenticity.

What you can do about it:

1. Clean the bracelet: Start by gently cleaning the jade bracelet with a soft cloth dampened with lukewarm water. Avoid using any chemicals or abrasive cleaners as they can further damage the stone. If the color change was caused by surface dirt or oils, this simple cleaning might restore its original beauty.

2. Re-polish or restring the bracelet: If the color change is due to the jade's surface becoming dull or scratched, consider taking it to a professional jeweler who specializes in jade or gemstone repairs. They can help re-polish the jade or restring the bracelet to improve its appearance.

3. Seek expert advice: If you're uncertain about the cause of the color change or how to restore the bracelet, seek advice from a reputable expert or a gemologist who has experience with jade. They will be able to evaluate the stone, identify any underlying issues, and provide appropriate solutions.

Remember, taking proper care of your jade bracelet is important to maintain its appearance and value. Avoid exposing it to chemicals or direct sunlight, clean it regularly, and store it safely when not in use.