Mineral Vein

Mineral Veins are naturally generated structures that spawn underground. They contain a cluster of Ore Blocks and can be found anywhere where there is stone.

Ores
The following ores may spawn in mineral veins:-
 * Coal Ore
 * Iron Ore
 * Gold Ore
 * Lapis Lazuli Ore
 * Redstone Ore
 * Diamond Ore
 * Emerald Ore
 * Nether Quartz Ore (Will be added in 0.12.0, only spawns in the Nether )

Trivia

 * Mineral Veins were the only generated structures that existed before Update 0.9.0.
 * Emerald Ores are usually found in quantities of 1, but very rarely spawn in 2-3.
 * Only certain ores can spawn at specified heights.
 * For example, only coal (or rarely iron) ore can spawn at surface level.
 * Rarer ores, like diamond ore, can only be found deep underground, between Layer 16 and 0, especially on layer 11 and 12.
 * In the future, Nether Quartz Ore may also spawn in Mineral veins.