Not sure how I feel about this; contrast is about black and white and the grey stone throws my ideas a bit off. The two stones (if that's what they are) don't show extreme contrast, just typical grey-grey.

Also, the extreme LHS of the left stone is almost lost in the white background - that's due to zero contrast.

Also, the background on the RHS looks very PSd. Perhaps a bit less here and a bit more work on the LH stone would have made this much better.

Sorry, it's a good idea, but I'm not much impressed.

This is nice, very close to great. The image is technically very good, very clean, nicely done. My mind instantly said, "how cool would this be if the left half/object was black?"

what is this thing?

This looks more like a still life with a black background than "extreme contrast." Still, I really like the photo. What is this?

Very interesting

i can't help but think of a person's behind while looking at this. :)
I do like the contrast!

IM going to assume that this is the contrast between black and white, though its not that clear from the treatment. Are these stones?