Ever wonder how Earth scientists examine rocks? We cut them up and throw them under a microscope ... and then everything ...

In general, mineral particles are small, having formed within confined areas such as lava flows or between grains of sediments. Large crystals found in geodes and other rocks are relatively rare.

All rocks are made of one or more minerals. Minerals are solid, naturally occurring substances with well-defined crystal ...

No bigger than a smartphone, this remarkable rock has layers that tell the story of the working lives and hardships of miners in the 1800s. A flawless blue topaz gemstone - the largest of its kind - ...

RENO, Nev. (KOLO) - The Reno-Sparks Convention Center (4590 S Virginia Street) is home this weekend to The Crystal Festival.

Geodes, for instance, are created when mineral-rich water seeps into hollow spaces within rock formations and slowly evaporates, leaving behind dazzling crystals like quartz and amethyst.

Oregon's state rock is celebrating its 60th anniversary this year. Here's everything to know about the thunderegg and where ...

These rocks are formed when magma solidifies. As the magma cools, mineral crystals will begin to grow. These crystals will grow and interlock to form a hard crystalline rock. Basalt is usually ...

Minerals, crystals, and fossils are beautiful, geologically fascinating, and can aid in spiritual practices, with specimens from all over the world found at area rock shops. Whether you're really ...