You can make DARK BLUE BLOCK by combining GRIMSTONE and BLUE BLOCK. This item belongs to color blocks category. Less than hour this seed takes to grow. Breaking this block will give you 5 experience points. There is no data about durability. Unfortunaltely seedratio information is not available. Oops, there is no entry in the database about gemratio. If you know something, please share. Currently we do not yet have knowledge about the blockratio of DARK BLUE BLOCK.