Archaeologists in Israel unearthed prehistoric hand axes that Homo erectus crafted from stones including fossils and crystals ...

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Homo erectus may have deliberately selected rocks embedded with fossils and crystals to craft their hand axes.

Amethyst is a violet variety of quartz that has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

Lovely day for a bit of rockhounding. Found agates, geodes, and the mild realization that we’re holding something older than ...

Geodes can be kind of ugly on the outside, but when cracked open, you can find something beautiful. Here's how to make your own. n 12 eggs n Water n Borax n Food coloring STEP 1: Crack each egg near ...

Geodes tend to be more rounded than the rocks surrounding them. They are also harder, because the minerals within make geodes harder than the rock they are encased in. Geodes are usually spheroidal, ...