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The blue color occurs mostly in very old ice from a very deep glacier and is the result hundreds or even thousands of years of compression and ongoing thawing and refreezing of the ice. Over time, these processes release much of the air that was originally trapped by the falling snow. As this happens, the reflective surfaces of our "snowflakes" disappear. The ability to reflect light exists only when there is air between the surfaces of the ice crystals.
I like the frosty green/brown that emerges from the icy blues - then we'll sprinkle it with complementary flowers