In placers, many iron spheres, 0.1-0.5mm in size were found, they are often composed of two or three layers of different phases. The outer shell consists of magnetite, tvustite and maghemite. The inner shell is of Ni-Fe metal phase which consists of kamacite and taenite, they are composed mainly of iron, minor nickel, a few of Si (various in composition from 0.1-3 % ) and a trace amounts of Cr, Cu and Co. The centre part is sometimes composed of Si-Fe core of gupeiite and xifengite. The iron sphere's shape is very characteristic, it is produced by the migra- tion of the melting material from head to tail on outer surface of the iron spheres after friction in the atmosphere. The head of the globule is round and the tail is flat with a few concentric circular troughs and a cavity is observed in the centre, thus forming typical button-like shape. The surface of iron spheres put up an appearances of wrinkles, brain pat- terns, and scales. All these characters indicate that iron spheres are of cosmic genesis derived from extraterrestrial space. Gupeiite Opaque, black to steel-grey with metallic luster. G (cal.)7.29，strongly magnetic, streak and powder black. Under the reflect microscope, it appears greyish-white with yellow tint in air, similar to polyxene. Isotropic, no cleavage, no twining, no internal reflec- Lion, polishing hardness, TiC>gupeiite, having a good polished section. VHN50-100 494.2-514.1。 The analyses calculated on the basis of four atoms, its formula.r is Fe 2.971 Ni 0.027 Mn 0.023 Si 0.979，and the ideal formular is Fe3Si. Its patterns identical with syth.etic FesSi, which has a facecentered cubic unite cell and a space group Fm3m. High-angles extrapolation graphs gave the cell dimension a 5.670 A，Z=4. Xifengite Steel grey, metallic luster, G(cal.)6.43. brittle. Strongly magnetite, streak and power being black. In plan light, xifengite is grey with yellowish tint is air, which much resembles pentlandite, but not so under crossed polaxs. It is a moderatly anisotropic mineral, With bluish grey, brownish anisotropism. Bireflectance and reflectance pleoehTOism are not detectable by eye, no cleaveage. Occurs asxeno- morphic aggregates, VHN50633-694. The analyses are calculated on the basis of eight atoms and its formula is Fe4.905Ni0.018Mn0.015Si3.062. The ideal formula is Fe5Si3. Xifengite is hexagonal with cell dimensions a 6.759，c 4.720 A，and a space group P63/man Z=2.