This isn't quite rule of thirds. The object is a little too far over the the left. Objects don't have to be on the third line, they can occupy the third space, but only if there is something else in the photo to balance it out. YOu don't in your case, so the photo is off spacial wise. If you cropped it down a little more it would be perfect. It is an amazing abstract piece, you have me sitting here wondering what the heck is that and gawking at the color contrasts.

I'm glad you're drawn to the color contrasts, because that's where the "thirds" are being used. What the heck it is, is a deteriorating orange (yummy). The top, white third is mold, the middle dark third is getting ready to mold, and the bottom third is orange. The stem in the bottom left quadrant of a "thirds" grid also creates a (minor) "line of sight" to the upper right.

I have re-edited this shot to make it comply to the "thirds grid." I made the three color layers more explicitly horozontal, and put the stem in the middle of the lower left quadrant. Thanks for your comment, dem90.