We are getting used to all the white and pale blues of icebergs so it was a surprise to see a green one close to the ship today. It was really dark green. They are called jade icebergs and it looked like a huge, smooth piece of jade, with white foam breaking over it. I think they are formed when the ice is a mixture of fresh and salt water. After lunch I saw a berg with a big black stripe through it; dirt that had been there since the ice was part of a glacier grinding slowly over the Antarctic land.