{CanDestroy:["minecraft:redstone_ore"]} doesn't let you destroy the block.

{CanDestroy:["minecraft:redstone_ore"]}

doesn't destroy redstone ore.

I expected to give myself a pick that could destroy all blocks underground in adventure mode.

What I got was all blocks except redstone ore being destroyed.

The command I'm using:
give @p minecraft:diamond_pickaxe 1 0 {Unbreakable:1,CanDestroy:["minecraft:stone","minecraft:iron_ore","minecraft:gold_ore","minecraft:diamond_ore","minecraft:redstone_ore","minecraft:lapis_ore","minecraft:coal_ore","minecraft:emerald_ore"],ench:[

{id:32,lvl:3}

],display:{Name:"Adventure Pickaxe"}}

Give yourself the pickaxe and layout the items listed and all will break but redstone ore.