Figures of the Article

• Appearance characteristics of Changhua yellow stone samples
• Magnification characteristics of the crust of Changhua yellow stone samples: a-c.A variety of white minerals in various pits on the stone crust; d.White flake mineral on the stone crust; e.Red disseminated material on the stone crust; f.Black impurity mineral on the stone crust
• Magnification characteristics of the interior of Changhua yellow stone：a.Rough stone crust and the interior of the stone demarcated by differences in transparency and colour; b.Fractures formed by disseminated hematite; c.Red hematite Disseminated inside the stone
• Polarizing microscope observation of Changhua yellow stone samples: a.The difference of mineral particle size between the crust and the interior of the stone is large; b.The difference of mineral particle size between the crust and the interior of the stone is not obvious; c.The opaque floc mineral is diaspore
• XRD patterns of Changhua yellow stone samples: a.Crust; b.Interior
• FTIR spectra of the crust of Changhua yellow stone samples: a.Fingerprint region; b.Functional group region
• FTIR spectra of the interior of Changhua yellow stone samples: a.Fingerprint region; b.Functional group region
• Micromorphological characteristics of epidermal impurity minerals in Changhua yellow stone samples : a.Halite; b.Gypsum; c.Woodhouseite
• Micromorphological characteristics of epidermal impurity minerals in Changhua yellow stone samples: a.Quartz; b.Spheroidal quartz; c.Calcium carbonate; d.Hematite; e.Spheroidal hematite; f.Barite
• Micromorphological characteristics of the crust of Changhua yellow stone samples
• Micromorphological characteristics of the fresh fracture surface of Changhua yellow stone samples