Thorium

Were you looking for the Thorium Brotherhood?

Rich Thorium Vein in Azshara

Thorium is a powerful metal mined on Azeroth. It borrows its name from the real-life radioactive metal thorium, which in turn was named after the Norse god of thunder Thor.

Thorium can be smelted into Thorium Bars. In addition to its inherent strength, Alchemists, Miners and Enchanters can further improve on Thorium ( [Enchanted Thorium Bar]) to allow for the creation of more powerful items.

Small Thorium Veins and Ooze Covered Thorium Veins require mining skill 200, Rich Thorium Veins and Rich Ooze Covered Thorium Vein require mining skill 215.

The Thorium Brotherhood faction drew its name from the metal, as well.

Items mined from Thorium Veins:

Background

Thorium is hard but not brittle, far lighter than it looks and glows even when cool.^[1] It has, in the past, been described as "the strongest of metals".^[2]

This section contains information from the Warcraft RPG which is considered non-canon.

This rare metal combines the weight of lead with the strength of steel. Orcs prize it for weapons because the extra weight allows a skilled user to strike with more force. Thorium armor is amazingly heavy and strong — only adamantine pierces it with any degree of reliability. Thorium is heavier than most metals. An item made from thorium weighs twice as much as the same item made from other metals.^[3]

Patch changes

Patch 1.3.0 (2005-03-07): Drop rates of very high-end gems have been somewhat increased on rich thorium veins.
Patch 0.12 (2004-10-11): Rich Thorium Nodes will now drop Arcanite.