Unexpected Green Colors

I took the photos below while photographing only ordinary drops of pure, clean water falling in front of a black featureless background.  In the first we see a  green orb.

We also see a green orb below:

We also see some green in the orb below:

We also see some green in the orb below:

We also see some green in the orb below

We also see some green in the orb below

We also see some green in the orb below