"Icebergs often appear mostly white because light bounces off air bubbles trapped inside the ice. But pure ice — ice without air bubbles that often forms on a berg’s underside — appears blue because it absorbs longer light wavelengths (warm colors like red and orange) and reflects shorter ones (the cooler colors).
Since the 1930s, though, mysterious capsized icebergs with greenundersides, nicknamed “jade bergs,” have been spotted around Antarctica.
Then in 2016, researchers discovered iron oxides in a decades-old preserved green ice sample taken from the Amery ice shelf in Antarctica.
Iron oxides such as rust reflect reds and oranges but absorb blue light. If these particles, possibly picked up from rocks crushed by the weight and friction of glaciers flowing toward the ocean, get incorporated into ice forming underwater, the result would be a vibrant green, Warren and his colleagues report online February 7 in the Journal of Geophysical Research: Oceans."
ScienceNews
Where is the way where light dwelleth? Job 38:19