Aetherium is a rare, blue luminescent mineral found in Dwemer city ruins. It was originally discovered by the Dwemer miners in Blackreach. It possesses magical qualities, though it is almost impossible to make anything out of it, without the proper tools.
The only known way of working with the material is by using the Aetherium Forge, an ancient Dwemer forge located deep below the city of Bthalft.
The items produced from Aetherium are said to be powerful artifacts imbued with very powerful enchantments.