News — why does jade turn white

Why did my  jade bangle bracelet turn white?  When I am asked this question,  I know that the person who has the once-colored and now-white jade has jadeite that was bleached with acid to remove the color, then artificial color was added to make it look beautiful.  That process gives the grade of C to the jadeite. Not all jadeite is green.  Most of the jade mined today has some green color, but the color is also mixed with lines of unattractive color, like brown lines, or spots.  Sometimes it doesn't even look like jade because the color is so...