You can make BLUE BLOCK by combining BRICKS and BLUEBERRY. BLUE BLOCK belongs to color blocks category. Better plant this and come back later, it takes some time. Currently we do not yet have knowledge about the durability of BLUE BLOCK. Unfortunaltely seedratio information is not available. There is no data about gemratio. Oops, there is no entry in the database about blockratio. If you know something, please share.