Chemica Composition and Physical Properties
| SiO2 |
>99.31% |
| Al2O3 |
<0.36% |
| Fe2O3 |
<0.018% |
| Specific weight |
>2.66g/cm3 |
| hardness mohs |
>8 |
| Porosity |
<0.38% |
| Actual abrasion rate of pebble |
<1.35 |
| Appearance of pebble |
round(ellipse) |
| Color of product after burning |
gray and white |
