Gold is really good at reflecting infrared which is why it was chosen as the coating for JWST's mirrors. I wonder if the colors just past visible on its way to IR would be just perceptible enough to give the look you are noticing???
Gold is really good at reflecting infrared which is why it was chosen as the coating for JWST's mirrors. I wonder if the colors just past visible on its way to IR would be just perceptible enough to give the look you are noticing???
Might the gold have tinted some of the IR into a visible wavelength? A wavelength that is otherwise not commonly seen in nature?