So, I had a J-VS2 diamond that every so often I would get a flash of brown from. I loved it other than that occasional flash. I took out my loupe and found the culprit - the inclusion on it was a crystal with a brown tinge!
Thanks for the input but please disregard. I started this thread to validate some important feedback that reeked of irresponsibility and agenda and that I ultimately dismissed. Perhaps a story for another day.