Live rock or crushed coral?

[magesturm]

I bought a 120 gallon saltwater tank off of craigslist and i can't tell if it has live sand or crushed coral. is there an easy way to tell. I've attached 2 pictures of it.

Thanks

 

[Wy Renegade]

Looks like sand, generally crushed coral is larger pieces.

 

[magesturm]

Thanks