Many minerals form beautiful crystals, but the most prized of all are gemstones. Uncut gems often look fairly ordinary–like rocks. It's only when they are cut and polished that they obtain the ...

Their ordered atomic arrangements are why most minerals have a crystal structure, as repeating units layer up. There are a ...

Each type of mineral has a unique crystal structure, which results from its chemical composition and a set of physical properties, such as hardness, color or magnetism, according to the United States ...

If you’re anything like me whenever you spot an interesting rock, it’s destined to make its way into your pocket.

Liquid-filled rocks form when minerals trap fluids, but depending on their composition they can either be classed as enhydros, enhydro agates, or fluid inclusions. An enhydro is a hollow nodule that ...