This is a piece of slate in my dog's yard that broke. I think it's a pretty cool picture, but i wish you couldn't see that dirt towards the left part of the crack. Zooming in, the dirt looks cool and textured, but if you are simply looking at it like you are now, it would be better without it.
For the record, my posts during the week (mon-fri) are prone to being short like this. I take about 20-40 minutes finding a picture and taking it, and about 10 minutes posting it. So it is time-consuming.
I took that last picture during spring break last year. This one I took today.