Question for you snow experts: are rainbow sparkles common?

No, Dewey, I think the rainbow sparkles are really some sort of sinister digital enhancement of the environment, or maybe evidence of global warming, or a result of pollutants in the snow. ;)

Seriously, this was one of the most amazing things I have ever seen in a long life of outdoor recreation. Just a freak occurrence -- the snow crystals were just right, the humidity and temp, the angle of the sunlight, or whatever. I will probably never get to see that again.