Dragonrock is the hardest known material in the universe being even stronger than diamond. Most forms of it have a purple hue and are luminescent. Dragonrock is an allotrope of iron, more specifically a form of the delta allotrope. This results in it having a cubic crystal structure as well it being non-magnetic. It is among the rare gemstones of the galaxy along with ruby, sapphire, emerald and diamond. Dragonrock usually forms from intense volcanic activity from compression making it a metamorphic rock. Normally when a delta allotrope cools down, it forms austenite, but because it forms in the lower part of a planet's crust, it maintains its general crystalline structure and remains that way due to compression even when it cools down. For this reason, it is very rare and difficult to obt