Marble and quartz, two darlings of kitchen countertops, share similarities as time-tested surfaces that add value as an investment to your house. But there are five key difference ...

The magic of crystal formation had already been done by natural processes; all that was needed was a little slicing and dicing. As it turns out, though, quartz is so immensely useful for a ...

color and marbling, thanks to their eons-long formation process deep underground. They're also a bit harder and resistant to scratching than quartz countertops. However, as quartzite is a natural ...

Pennsylvania may not be the first place that comes to mind when thinking of gemstone mining, but the Keystone State has a surprising diversity of beautiful natural gemstones that can be found across ...