Chlorophane is a gemstone that can store heat, light, and kinetic energy in itself, making it the perfect tool for translation magic. simply place your crystal in the sunlight, wait several hours, and bam you have free energy. It will also charge any other crystal varieties that are touching it, but it will take more time.
The discovery of this colossal chlorophane changed the world forever, as it was large enough to power entire infrastructures in cities. After this, many more mining operations opened up searching for similar sized crystals. While it is very rare to find any of this size, the abundance of chlorophane that came from this movement made many new inventions possible. charging plates, metal golems, air cannons, and ship engines all were made possible with the new solar power source unlocked.