@stux Seems like the kind of thing we should only be able to see in a documentary, where divers went under the iceberg at some risk to show us a thing we should never see *naturally*.
Why is glacier ice blue? - Woods Hole Oceanographic Institution
When sunlight shines on a field of snow, it reflects a bright—even blinding—white. But if you get a good look at the leading edge of a glacier, you’ll find that the ice inside is a brilliant blue.