*edit* WOW, thank you SO much for the DD!
I used a D200 for that shot, with a 300mm F2.8 lens. I'll see what I can do about a print, the original file is on my external harddrive somewhere, so, maybe this weekend i'll set it up if i can get around to it.
The sand is fascinating, looks sort of HDRish? did you edit it significantly?
The dust looks like solid matter
keep up the good work
congrats on the DD.