Ackelcite

Ackelcite is a powerfully radioactive material that was often used in artificing armaments.  The practice died out as the artificers using it realized they were dying out from its use.  The half life on ackelcite appears to be relatively short compared to other materials, however the exact half life is unknown.  

Any actual purpose for ackelcite is unknown, but damn if it doesn't look cool!

Explorer's note from Master Artificer Fenwick Sparkbyte, dated, 1 of Renewal. Ackelciteis frequently found in Sky Shard, and the mining of it will imbue the object mining it with a glow.  No immediate negative side effects have occurred, but we will keep continue to monitor ourselves after coming across it.