Granite stone hardness is around grade 6. For hard stone crushing, we suggest jaw crusher and cone crusher. The two crushers can handle big size stone, also meet the high capacity needs. For granite crushing line: hopper–vibrating feeder–primary jaw crusher–second cone crusher–vibrating screen–belt conveyor– final different size gravels. For cheaper invest budget, primary crusher and secondary crusher both can be jaw crusher, PE and PEX. Check more on our website for its tech specifications.