Iceburst stone (氷爆石 Hyō baku seki?) is a mysterious resource that enables the vertical maneuvering equipment to function. They are found only on Paradis Island.[1]


The caverns found beneath the factory city were once volcanic calderas. As temperatures beneath the earth decreased as volcanic activity ceased, the natural gases within the caverns solidified at high pressures, becoming like icy stones. When exposed to temperatures greater than the freezing temperatures in the caverns where the stones are found, the stones rapidly vaporize. This creates a small, bursting explosion from which these stones get their name.[2]

According to Zeke Yeager, iceburst stones are only found on Paradis Island, deposited there long ago in gigantic holes using the power of the Titans. As a result, they are extremely rare and valuable. The people of Paradis are ignorant of how valuable the stones would be to the world outside. He claims that the mineral can make a struggling nation like Hizuru prosper.[1] However, it is possible Zeke has been misinformed or has gotten iceburst stones confused with the stones found in the Reiss Chapel (see Trivia).


Due to the practicality of such amounts of gas coming naturally in compact, solid forms, the iceburst stones are used as the source of gas which powers vertical maneuvering equipment. They are placed into canisters made from iron bamboo for storage, and when heated they release the gas necessary to make proper use of the equipment. However, improper treatment or use of the gas yielded from iceburst stones can be fatal.[3]

Paradis Island is developing an aircraft using iceburst stones as fuel.[4]