Whether you know it or not, you encounter crystals in your everyday life quite regularly. Table salt, sugar and snowflakes are classified as types of crystals, as are many gemstones—including amethyst ...

Primates of all stripes really love their crystals. Archeologists have found the shiny rocks at dig sites dating back as long as 780,000 years ago. Although, we are still not sure if our ancestors ...

Scientifically speaking, the term “crystal” refers to any solid that has an ordered chemical structure. This means that its parts are arranged in a precisely ordered pattern, like bricks in a wall.