Turns out (much to the chagrin of geologists in the housing market), those countertops are likely neither granite nor all the same type of rock. That's because rocks are ... you can use those skills ...

Evidence for the use of rock crystal - a rare type of perfectly transparent quartz which forms in large hexagonal gems - has occasionally been found at prehistoric sites in the British Isles, but ...

We're after pure gold, but rock that contains gold also includes lots of other materials such as quartz, calcite ... a physical mixture of metals, or a type of alloy. Using mercury is a pretty ...