Now, much of the time, once you've been trained to identify minerals, you can use those skills to give a rock its proper name. The countertop has quartz, plagioclase feldspar, potassium feldspar and ...

To many people, a rock is just a rock. If anyone has been house shopping, you know how realtors will mention that the countertops are "granite" and you might wonder why, from house to house, they ...