# Celdonum Celdonum crystals are verdant heptagon crystal forms found within the [[Celdonum Caves]] of [[Celveth]]. They are believed to be captured [[Mystic]] in it's purest form, although no studies have been able to prove this. Unexplainable by scientists, Celdonum violently reacts with several different elements including Aluminium, Copper, Exulium, and Invium. For this reason, they are utilized in various technologies such as Firearms and Transportation, as well as excavation tools. Celdonum crystals generate excessive heat when discharging energy. There are a few main sizes of crystals which are used throughout various technologies. Each crystal can withstand a certain amount of heat build-up before shattering in a violent explosion of energy. The sizes and their heat tolerance is listed below. ###### Celdonum Crystals >[!infobox|left] >Size | Tolerance | Dimensions >---:|:---:|--- >Tiny: | 3 | 0.23" x 0.23" x 0.7" >Small: | 7 | 0.37" x 0.37" x 1.1" >Medium: | 11 | 0.77" x 0.77" x 2.3" >Large: | 19 | 1.57" x 1.57" x 4.7"