This beautiful iceberg was grounded by the low tides in Antarctica outside Cuverville island. The water being so crystal clear and free of sediment that light travels down without reflecting much back making it appear black. In addition the bright overcast conditions and high reflectivity of the snow and ice forces me to let in less light in the camera, darkening the water down even more. It's this contrast that gives the image a sense of drama.
Lately I have been very active on Google+ and have found the community to be very engaging, for that reason I have been premiering a lot of my content on my page here first. So I feel compelled to post some extra info derived from conversations on this article as well.
Thomas Russ Arnestad asks: "I'm curious about one thing though, there are some grey/black spots/shaded in the blue ice; is this a result of pollution?"
I was very careful to keep those spots in there, as they aren't artificial (nor are they dust spots on the sensor). I'm delighted you noticed them because they tell a fantastic story about the formation of these icebergs. I think it's safe to say these icebergs are pretty much geological in origin, as all icebergs start off as glacial ice formed by the compaction of snow on the mountain slope. This ice slowly flows down the mountain, and in doing so it grinds away at the rock, creating gravel and silt and carving U shaped valleys in the mountain side. When some of these pieces of ice finally make it into the ocean, they may have picked up lots of debris and rocks, some can be extremely dirty, huge boulders can even be found in icebergs. You can even go diving in the antarctic and find large "erratics" deposited by rock carrying icebergs.
The older the ice, the more likely it is to be at the bottom of a glacier where there is an extreme amount of pressure, this pushes out air bubbles and causes the ice to become more translucent, and this in turn can make the ice bluer, hence the wonderful colours in this ice and the high amounts debris trapped inside.
Technical photo details: This was shot hand held while driving a zodiac (like the image atop) , then tonemapped in HDR software Photomatix. Later printed on metallic paper the colours really shine and shift, much like the ice does in real life! Approximate location here.