i dont think the reflection adds anything to the photo here, other than some grains on the surface of the mirror/glass.
morover the background being the same color as the sand, or whatever the grains are, makes the photo plainer and less interesting. you should have picked something that would make the olive stand out more.
im giving it an 8 solely based on had you taken out the mirror and disregarding the background, the photo is nice and crisp and meets the challenge with a good title that is an oxymoron.
Like the idea; it took me a minute to see the sand because I was initially drawn to the reflection and overall shape. For this challenge I might have preferred not to have the reflection so the viewer gets the dry bit immediately.
Very nice idea and lighting. My only suggestion would be to perhaps diffuse the light with something. The circular light in the reflection is a little bit distracting.
You're going to really wish you cleaned the mirror by the time this challenge is done with votes/commenting. :D Nice take on the challenge theme. Couple of hotspots from the strong lighting, but a pleasing image nonetheless. Good luck in the challenge.