You must have DARK CAVE BACKGROUND and CAVE DIRT to make CAVE COLUMN. You can find this item in terrain category. It takes 0d00h01m08s to grow CAVE COLUMN from seed to tree. Unfortunaltely durability information is not available. There is no data about seedratio. Oops, there is no entry in the database about gemratio. If you know something, please share. Unfortunaltely blockratio information is not available.