Asteroids are fascinating scientific objects, in the sense that they become increasingly more interesting the more you learn about them. In particular, I felt it may be worth it to start a thread for any discussion about the really exotic minerals that can form in zero-g, including the (afaik) only known natural quasicrystal:http://en.wikipedia.org/wiki/Icosahedritehttp://www.pnas.org/content/109/5/1396.abstractOne can always hope for the discovery of some extremely slow-forming unobtainium mineral as a killer app for asteroid mining.
Interesting possibility. But I don't know of any minerals found exclusively in meteorites. Icosahedrite is a terrestrial mineral, found in Siberia.
Some unique textures are found in meteorites, for example the Widmanstatten texture in irons. This is due to very slow cooling, rather than zero gravity, AFAIK.
Space Station Live: Getting the Dirt on RegolithPublished on May 4, 2016NASA Commentator Lori Meggs at the Marshall Space Flight Center talks to Strata-1 co-investigator Kristen John about her space station study to understand the behavior of regolith in microgravity. Regolith is the impact-shattered "soil" found on asteroids, comets, the moon, and other airless worlds, but it is different from soil here on Earth in that it contains no living material. It is important NASA learns more about regolith to help in the design of spacesuits and hardware for future exploration missions.