Granite

From DwarfFortressWiki

Granite

▓ ▓ ▓ ▓ ▓ ▓ ▓ ● = = = ▓ ▓ ▓ ● ● = = = ▓ ▓ ● ● ● ● = = ▓ ● ● ● ● ● ● =
Uses
Masonry Stone crafting Construction
Properties
Igneous intrusive layer Material value 1
Contains
Native gold Native silver Horn silver Galena Cassiterite Tetrahedrite Bismuthinite Cryolite Rutile Pyrolusite Pitchblende Hornblende Orthoclase Microline Mica
Wikipedia article

Granite is the only material that contains bismuthinite, and the only stone that contains cassiterite.