Thanks Jim. This is a very small piece of a mirror, less than an inch in length, used as part of a wall mural/collage in a train station near me. This piece happened to be cracked, and as I took a shots of it, I found that from just the right angle I could see a lot of light reflected from it - white light. So I was pretty surprised when looking at my display after taking the shot, to see the gold tones in the reflections. I don't know where they came from.
