Ancient Chinese glass Chemical composition of Warring States and Han period glasses Chemical composition of Warring States and Han period glasses

| Objects | Date_ | SiO_2 | Al_2_O_3 | Fe_2_O_3 | K_2_O | Na_2_O |
|---|---|---|---|---|---|---|
| Eye bead | 4th to 3rd centuries BC | 55 | 2.13 | 0.62 | 4.05 | 7.53 |
| Large bead | Han Dynasty | 37.2 | 0.15 | 0.01 | 0.02 | 3.94 |
| Cube shaped bead | 4th to 1st centuries BC | 51 | 0.46 | 0.10 | 0.084 | 6.12 |
| Bi disk | 3rd century BC | 36.8 | 0.28 | 0.14 | 0.16 | 1.87 |
| `Glass garment` plaque | Late Han Dyn | 36.03 | 0.02 | 0.07 | 0.07 | 2.27 |
| Ritual disk | Warring States | 37.16 | 0.62 | 0.16 | 0.27 | 3.32 |