Ameryth: In The Hands of Fate
When the Aether flows through crystal formations, it concentrates and becomes aetherite, which can then be carefully extracted from wherever it is located. Initially, the crystals were to be used in the creation of jewelry and other beautiful objects. Such trinkets were particularly useful in the creation of enchanted items as the aetherite holds the magic very well.
Three hundred years ago, a scholar discovered a means of generating power from portions of raw aetherite. When given a powerful burst of energy, aetherite will continuously recycle that energy, effectively creating a self-charging battery that can then be used to power all sorts of technology. In modern times, aetherite can be processed to create even more powerful energy sources, such as those that drive the massive airship fleets of the Elassian military.