sandstone | 0.28 |
a hardness of 7 | 0.36 |
the second most common … | 0.68 |
hard | 0.66 |
resistant | 0.55 |
colorless | 0.54 |
piezoelectric | 0.52 |
clear | 0.46 |
stable | 0.46 |
white | 0.41 |
crystalline | 0.40 |
pink | 0.25 |
More » |
mineral | 0.62 |
silicon dioxide | 0.40 |
used in watch | 0.58 |
composed of oxygen | 0.46 |
used in radio | 0.41 |
found near glacier | 0.25 |
cut along the c-axis | 0.25 |
used in prehistoric ire… | 0.25 |
used in television | 0.25 |
present in nearly all m… | 0.22 |