Daubreelite is a rare mineral that was first discovered in the Daubree meteorite. This mineral is composed of nickel and iron and is classified as a sulfide. There are a few other names that this mineral is known by, including nickel-iron sulfide and iron-nickel sulfide. Another synonym for Daubreelite is brezinaite, which was named after the Austrian mineralogist Gustav Brezina. Other minerals that share similar chemical compositions with Daubreelite include awaruite, josephinite, and taenite. This mineral is an important research subject for scientists who are studying the composition of meteorites and the conditions they were formed in.