Hardness basalt granite iron ore etc. hardness basaltgranite. iron ore etc . hcs 90 cone crusher577 . it can apply to the middle and smallbroken bitsbreak materious of mines and iron ore with the knoop number hardness f mine 5-16ssuch as sums rock non-ferrous metal oreetc to crush many kinds of mid-hard or hard rocks and ores such as iron ore limestone granite basalt quartz.