Another rainbow snowflake from january 2013. In center of this crystal can be seen colored areas, caused by thin film optical interference effect. 9 RAWs averaged. Looks better in original resolution (1600 x 1200 pixels).
This is cropped central region of the crystal after averaging, with 500% magnification and without any additional processing (no sharpening, color altering or any contrast curves):
If you want to see more snowflakes, you can browse through all snowflake pictures.
Here you'll find snowflake photo wallpapers in numerous resolutions and screen proportions, up to Ultra HD 4K.
And here is article about snowflake macro photography.