Lumin

Lumin is a fuel with luminescent properties. Lumin is not native to the continent Matonga (and perhaps not even to the enitre planet Tunoda). It was introduced to the planet when the The First Skystone arrived as Lumin is a widely used fuel source on other planets that delivers the much needed power to make interplanetary transportation happen. 
Though the skystone in Clearwen was the first to land on Tunoda, the unfortunate malfunction leading up to the crash burned almost all of the lumin that was stored on board. Only traces of it remain at the site of the wreckage. After the planet was magically hidden from other planets, no more Lumin has arrived at Tunoda. The largest quantity of remaining Lumin is located at the bottom of the Redpond waters. This was the result of an areal fight between the first alliance heroes and the Great Old Ones. One of the heroes vehicles crashed right after take-off and was filled with Lumin and the time. 
The Lumin in Redpond has led to an interesting purple luminescant glow that manifests in Purpis spefically. Local fish farmers harvest Lumin from the Purpis without knowing they are handling an ancient fuel source. Small quantities of Lumin are bottled into glass to create solar chargeable lights that are in high demand for mining activities and night lights for small children.