Things are as they are, but mostly because of the way we see them. The discoloration in the turquoise is something that appeared suddenly. It's not the way it was when first I received the bracelet. So, as far as I know, "It's not supposed to be there." But what if I were told that this is the naturally occurring discoloration in the turquoise and that its appearance adds to the beauty of the piece. Just as labels sometimes tell us such things as "the variances in shades in the fabric is due to the natural dyes used in its creation and are part of what gives the fabric its unique quality."
So it really is in the eye of the beholder, or more precisely--the mind. What we see is not completely what we see, but the collection of information that informs our perception.
