Olivine meteorites refer to stony-iron meteorites containing 5% olivine and awlite, hematite, nickelite and troilite. Contains centimeter-scale crystals of olivine, an olivine component within an iron-nickel matrix. Coarse metal areas will have a Weidmann pattern after etching, with trace components including ferrite, troilite, chromite, pyroxene, and phosphates (monetite, monetite, kaleite, and phosphorus sodalite). Olivine meteorites were once thought to be the impact of a differentiated asteroid that scattered and sputtered material between the core and the boundary of the earth. Another new hypothesis is that they are a mixture of core and subterranean materials. The meteorite itself is a soft object. At the moment when it fell from the alien to the earth, it fell to the earth after being burned at a high temperature of more than 2,200 degrees by the friction of the atmosphere, and formed a solid after tens of millions of years. The Sahara Desert is the driest region on Earth. The special geographical and climatic environment of this area is very favorable for the preservation and search of meteorites.