Glass - IR Reflectance spectra
- Red glass (Au) – 0.61 ct – Man-made
- Blue glass (Co) – 4.20 ct – Man-made
- Blue glass (Co) – facetted marble – Man-made
- Blue to pink color change glass (Nd) – 4.60 ct – Man-made
- Red glass (Se) – 4.50 ct – Man-made
- Violet to red color change glass (Tm) – 7.20 ct – Man-made
- Neon green glass – 0.66 ct – Man-made
- Blue glass – 4.75 ct – Man-made
- Dark-green glass – 8.67 ct rough – Man-made
- Green-blue glass – 10.57 ct – Man-made, Borena, Ethiopia
- Ancient blue glass – 16.15 ct slice – Man-made, Ispahan, Iran
- Light-yellow uran glass – 21.75 ct – Man-made
Raw material is not reflective enough unless polished: no spectrum.