Hematine (ceramic barium-strontium ferrite) - IR Reflectance spectra Hematine Index IR-Reflectance Photoluminescence UV-Vis-NIR Metallic black hematine (ceramic barium-strontium ferrite) – 56.45 ct – Man-made, China Metallic black hematine (ceramic barium-strontium ferrite) – 56.45 ct – Man-made, China