The site of Cave Creek Regional Park has a storied history. Before there were hiking trails, campgrounds and picnic ramadas, the park and its surroundings were used by the ancient Hohokam people ...

Slate, along with sandstone, quartzite, soapstone and granite, is in the other big group, with stones composed mostly of silicates, such as quartz and feldspar. Acids eat into calcium carbonate ...

Most gravestones made over the last few centuries are made of a few types of rock: marble, slate, and granite are ... Well, the two best might be garnet and quartz. Now, depending on your desire ...