I'm sorry - but this doesn't work for me - there isn't much holding my interest. Not a fan of your background, and you might have tried cropping so the light doesn't fade as much on the sides.
I am assuming the title has to do with the wrestler "The Rock", which I know very little about. As far as the image goes, it has absolutely nothing to do with scent or aroma. I've smelled many a rock and can say, from first hand experience that the majority of them have no overwhelming scent or aroma.
I'm sorry to have to say this, and I'll probably read about it in the forums...but this image doesn't meet the challenge. Even the title (which is a major stretch imho) doesn't help the image reach across the "doesn't meet the challenge" gap.
I'll now comment on the image itself. The on camera flash gives the subject an "in your face" quality which even when taking a picture of a rock isn't all that flattering. A bit of sidelighting with some interesting shadows could help add a bit of depth and texture to this shot.
The composition is rather dull in that the rock is quite centered and static. It's a rock in the middle of the frame...I'm not sure following the rule of thirds would even help this image.
I do have to say that I like the depth of field you used on this shot. The front of the rock is in focus while the back of it gets slightly blurry.
I'm sorry for the less than spectacular comments, but I'm hoping to give you some help in improving your photography as well as help in meeting the challenge criteria.
No I can't, I don't understand the title or the image. I see a picture of a stone, does not express smell to me. It is lit by the hard light of a flash, surrounded by strong shadows, try bouncing the flash against the ceiling for a softer effect.
Sharpest focus actually seems to be a bit in front of the rock. I don't care for the background, but then, I'm not really sure I know what you are trying to say here.