This looks great so far! My only advice is that you you make the stone and bedrock have more of a rough feel, and make the sand more coarse/grainy, so that it looks the right amount of natural.

It looks decent. I like the stone bricks. The stone could use some work. I feel like it should look smoother. The dirt looks fine but the coarse dirt looks a little too harsh. Maybe soften the coarseness a bit. The items look pretty good to me. Something that I'm noticing is that some of the textures (like in the coal) look a little noisy like a jumbledness of different shades. Smoothing those out I think would improve those textures. Probably a bit much to take in but I just felt like sharing what my first impression on this was. :)