Thought iceberg always appears white? This picture of a black iceberg is going viral via reddit. Apparently, iceberg can also at times appears blue, green, brown, black or a combination of these colors.
According to The Canadian Encyclopedia:
Most icebergs are white except along freshly calved ice cliffs, which tend to appear blue. Others may appear green, brown or black, or combinations of these colours. These icebergs have usually rolled over, exposing basal ice, or have emerged from below water level. The various colorations are caused by differences in density, air-bubble content and impurities. For example, black ice is of high density and bubble free; dark layers indicate the presence of rock materials derived from the base of the parent glacier.