Metallic and intermetallic compounds of Fe-group elements from Luobusa ophiolite chromitites were studied by X-ray diffraction (XRD) analysis. The results indicate that they belong to four mineral species. These minerals are intergrown with such minerals as UHP mineral wustite and platinum-group minerals. Formed under the strong reduction condition of great depth, these minerals are similar to the earth's core in chemical composition. It is thus held that the iron-group minerals might have been derived from the mantle or the core of the earth.