Take a walk down the mineralogy collection of any good natural history museum and your face will be aglow with the sparkle of minerals, crystals, and gemstones – but what’s the difference ...

The atoms and molecules that make up all substances are connected in a particular way for each substance. In crystals, the particles repeat in a pattern that gives the crystal its special shape. Some ...

A big surprise for Mom. Crystals are substances made of tiny particles that fit together in a pattern that repeats itself. A crystal will have a certain number of flat sides, sharp edges, and pointy ...