Chalcedonies include many types of cryptocrystalline quartz gems ... Many minerals form beautiful crystals, but the most prized of all are gemstones. Uncut gems often look fairly ordinary ...

When it comes to choosing an engagement ring, many couples are seeking something unique and beautiful. Luxuria gemstone ...

The world's rarest gemstone is made of kyawthuite, a transparent reddish-orange mineral that’s known from just one sample ...

Each month has at least one representative gemstone. Here's what you need to know about November's birthstones.

Oberstein’s glittering history is on display at the German Museum of Minerals, along with colorful rocks and gems from the region and across the globe.