| Fe2O3 | 45-60% |
| SiO2 | 25-40% |
| Al2O3 | Max 8% |
| CaO | Max 8% |
| MgO | Max 3% |
| Moisture | Min. 6 MoH |
| Hardness | 95%min |
| Conductivity of aqueous extract | Max. 25mSm |
| Water soluble chloride content | Max. 0.0025% |
| Minus 0.25 | mm | 1-6% |
|---|---|---|
| Plus 0.25 | mm | 1-7% |
| Plus 0.60 | mm | 2-5% |
| Plus 0.71 | mm | 8-15% |
| Plus 1.00 | mm | 25-40% |
| Plus 1.68 | mm | 20-30% |
| Plus 2.38 | mm | 15-30% |
| Plus 3.36 | mm | 0-4% |
| Plus 4.00 | mm | 0-1% |
| Plus 4.75 | mm | 0-0.5% |