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| Item | Index |
| SiO2 | 45-55% |
| CaO | 40-50% |
| Fe2O3 | 1.0%max |
| S | 0.04%max |
| P | 0.04%max |
| Al2O3 | 1.5%max |
| MGO | 1.5%max |
| L.O.I | 1.5-4.0%max |
| Sedimentation | 30 Minutes |
| pH Value | 7-9 |
(This is only for reference, and products can be produced according to clients' requirements.)

| Item | Index |
| Whiteness | 90min |
| Mohs Hardness | 4.5 |
| Specific gravity | 2.90% |
| Refractive Index | 1.63 |
| Surface Water &le | 0.30% |

We provide different grades of wollastonite, including paper grade, metallurgy grade, ceramic grade, etc.
Plastics and rubber applications were estimated to account for 25% to 35% of U.S. sales in 2009, followed by ceramics with 20% to 25%; paint, 10% to 15%; metallurgical applications, 10% to 15%; friction products, 10% to 15%; and miscellaneous, 10% to 15%. Ceramic applications probably account for 30% to 40% of wollastonite sales worldwide, followed by polymers (plastics and rubber) with 30% to 35% of sales, and paint with 10% to 15% of sales. The remaining sales were for construction, friction products, and metallurgical applications.




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