This is a textured vase I have that had water in it and I added some blue food colouring and then the sun shone through the window and gave me this effect.
I would have guessed ice cubes floating in something just by looking at it. An effective desktop, plenty of room for icons, and interesting use of light and water.
Oh this is absolutely lovely! One good thing about the "dark and dreary days of winter" (especially in an area where there is no picturesque snow at the moment) is that photographers can't kick the shooting habit! So they go and conjure up some great artistic indoor shots like this one.