| Al2O3 | Typical | 26 - 40 |
| Fe2O3 | Typical | 25 - 45 |
| SiO2 | Typical | 15 - 20 |
| TiO2 | Typical | 19 - 32 |
| Th + U (ppm) | Typical | 100 - 220 |
| Specific Activity1 | Typical | < 1.0 Bq/g |
| ZrO2 | Typical | 0.1 - 0.5 |
| Moisture | Typical | 0.05 - 0.20 |
Sieves from British Standard BS410:1986 and American Standard ASTM E-11-81
| Mesh No | Sieve Apeture | % Retained | |
| Typical | Range | ||
| 52 | 300 | 13 | 10 - 20 |
| 60 | 250 | 29 | 28 - 42 |
| 70 | 212 | 35 | 28 - 38 |
| 85 | 180 | 19 | 10 - 20 |
| 100 | 150 | 4 | 2 - 8 |
| -100 | -150 | <1 | 0 - 2 |
| Staurolite | Typical | 90 - 95 |
| Ilmenite | Typical | 5 - 7 |
| Garnet | Typical | 1 - 3 |
| Kyanite | Typical | 0.1 - 1.0 |
| Zircon | Typical | 0.1 - 1.0 |
| Monazite | Typical | 0.0 - 0.2 |
| Free Quartz | Typical | 0.04 - 0.10 |
| Specific Gravity* | 3.6 – 3.9 |
| Bulk density. (kg/m3). | 2000 |
| Hardness (MOHS)*. | 7 – 7.5 |
Note: Staurolite being a natural product, its chemical and physical analysis is expected to vary.
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