Rock Breaker

Rock Breaker is an early-game station that destroys stone-like blocks (like Cobblestone, Limestone, Meteorite Rock, etc.) and returns any useful materials that were hiding inside these rocks. Most blocks cost 0 pixels, and the materials within them can be very valuable, so this is very beneficial to do.

Rock Breaker processes 1 block every 0.75 seconds. Later in the game it gets replaced by Rock Crusher, which is faster and yields better results.
 * See the page Rock Crusher for the list of stones/rocks that can be crushed.

Sifter and Powder Sifter can process powder-like blocks in a similar manner.