Unclassified meteorites are meteorites that have not been analyzed by a meteoriticist, approved by the Nomenclature Committee (NomComm), published in the Meteoritical Bulletin (MetBull), or some combination thereof. There are many reasons to not classify a Work in progress. A solid natural object reaching a planet’s surface from interplanetary space. Solid portion of a meteoroid that survives its fall to Earth, or some other body. Meteorites are classified as stony meteorites, iron meteorites, and stony-iron meteorites. These groups are further divided according to their mineralogy and including for example the specimen being too small, the cost of classification being too high, or the specimen has aesthetic value that would be impaired should material be removed. Even if a specimen has been classified, that classification is not final until it has been published in the MetBull. There are many meteorites that have not been published or have been published as “provisional” due to the type specimen not being deposited or the NomComm not approving it for publication. A buyer can be assured that a specimen is in fact a meteorite, even without having been classified, by purchasing from a trusted dealer and through visual aspects that are clearly associated with meteorites like having Outermost layer of a differentiated planet, asteroid or moon, usually consisting of silicate rock and extending no more than 10s of km from the surface. The term is also applied to icy bodies, in which case it is composed of ices, frozen gases, and accumulated meteoritic material. On Earth, the, orientation, visible Roughly spherical aggregate of coarse crystals formed from the rapid cooling and solidification of a melt at ~1400 ° C. Large numbers of chondrules are found in all chondrites except for the CI group of carbonaceous chondrites. Chondrules are typically 0.5-2 mm in diameter and are usually composed of olivine, magnetic susceptibility, etc.