Magic is everywhere in the Shiji-long world and while the elders are able to harvest it directly from the environment, the majority of the Shiji-Long themselves cannot do this. But magic stores itself naturally away in some minerals. These gemstones save up magic over time and become more powerful over time. Lesser minerals can only hold so much magic and usually lose it when used too often. Gemstones like sapphires, emeralds and rubies are for powerful magic and long-term use. A lot of technology the Shiji-Long are using relies on these gems.