Prints available at Artist website (mirrors at Pixels and FineArtAmerica).
Licenses for commercial use - at Shutterstock.com.
This snow crystal was captured as quick series of 8 identical RAW shots, and averaged to boost signal-to-noise ratio of this picture. Source photos was taken on large sheet of glass with LED back lighting, using Canon Powershot A650is and additional lens Helios 44M-5, reversely mounted in front of camera's optics, in January 2013, Moscow.
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.