A Mineralogical Study of Spherulitic Fe-minerals from Cavities of Hongshan Archaic Jade
红山古玉孔洞内首次发现球粒状铁质矿物

Based on a study of spherulitic magnetite, goethite, hematite, iron and other ferrous components from vugs of Hongshan Archaic Jade with a comparison with kidney ore formed by Paleozoic marine deposit, this paper revealed the genesis of magnetite and other Fe-mineral spherolite. The research findings may serve as an efficient method for identifying Hongshan Archaic Jade.