Very common occurrence.
And of course they never altered the picture, so must be the light-source and or monitor.
Happens on every platform including here on forums and FB? dont get me going. I'm fed up with looking at Fire Agate for exactly that reason.
By the way, must be something wrong with my eyes, but, except for your last shot showing light within the jade, I can't see any blue in any of the stones shown.
Trust me this piece is blue: