The explosion initiated by magical power crystals and the explosives on Earth were two totally different things. Even though the final outcome for both would be magnificent fireworks, the process was vastly different. The latter was a once-off swift and violent chemical reaction, while the former, by its very nature, was a magic process.
As such, the detonation of magical power crystals did not have a strict demand on its packaging; neither was it particular about the container used. It also had no requirements to be loaded into a chamber. But in place of that, it required all storage crystals to be placed within range of the explosive magic circle; it required precision in the explosive magic circle itself as well as the high quality and compatibility of the magic conducting materials; it also required the total amount of magical power stored in the crystals to be full.
