But let’s be a bit more specific. What gives gemstones colors, or rather, what changes the way they absorb and reflect light so that they come out in so many different, striking colors?

Its name derives from the medieval ... blue and yellow. A garnet's color depends on its chemical composition, according tothe International Gem Society. For instance, almandine garnets range ...

The highest-quality gems have no inclusions visible to the naked eye, are vibrant in color, and are typically more expensive gems like rubies, sapphires and emeralds. GIA would rate the highest ...

Chalcedonies include many types of cryptocrystalline quartz gems and feature a number of different colors. Geologists can tell a chalcedony from the arrangement and structure of its crystals.

These gems, discovered in the Karowe Mine in Botswana, are set to make a significant impact on the global market. The company hosted a national competition in Botswana for naming the diamonds ...

Garnet is January's birthstone. Its name derives from the medieval Latin " granatus ," meaning "pomegranate," according to the Geological Institute of America. The name is also tied to the Middle ...