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| Country of origin: | Lingshou |
|---|---|
| Grade: | Superior grade |
| Mohs hardness: | 1.5 |
| Impurity content ＜: | 0.1 (%) |
| Density: | 108（g/cm3） |
| Melting point: | 1450 (℃) |
| Silica content: | 46 (%) |
| MgO content: | 18 (%) |
| Volume weight after expansion: | 0.18（g/cm3） |
| Color: | Golden |
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