Lapis Lazuli is a mineral block used as blue dye. It is found near to every single ore (excluding emeralds). Like [http://mcpc.wikia.com/wiki/Coal_Ore coal, redstone, diamonds and emeralds, lapis drops the item, not the block. Lapis Lazuli drops 5-8 Lapis Lazuli; blue dye. If a pickaxe has Fortune III, a player can get 1/2 a stack from 1 ore.
Lapis Lazuli is found from bedrock level - level 30, but is mostly found at levels 10-16. Lapis can be mined with a stone pickaxe. They come in veins from 2-8
Lapis Lazuli Ore: /give @p lapis_ore