| Material Analysis | Borosilicate | Soda – Lime | Black Glass |
| Silica | 80% | 72% | 69.5% |
| Soda | 4% | 15% | 15.4% |
| Lime | — | 9% | 3.8% |
| Magnesium | — | 3% | — |
| Alumina | 2% | 1% | 0.3% |
| Boric Oxide | 14% | — | 1.1% |
| Manganese Oxide | — | — | 7.2% |
| Potassium Oxide | — | — | 2.7% |
| Physical Properties | |||
| Specific Gravity | 2.23 | 2.47 | 2.53 |
| Density | 0.0806 lb/in.3 | 0.0892 lb/in.3 | 0.0914 lb/in.3 |
