Grow your own crystals with these easy recipes. Learn about crystal structures and how crystals are classified.

Potassium nitrate crystals form needle shapes when crystallized from water.
Potassium nitrate crystals are among the safest and easiest crystals to grow. Potassium nitrate (KNO3) is also known as saltpeter. It’s used in processed meats, fertilizers, gunpowder, fireworks, and many science projects. Here’s how to make potassium nitrate crystals and a look at how to up your game to grow […]

How to Make Potassium Nitrate Crystals