amethyst

Gems in jewelry settings can’t be evaluated the same way as loose stones. These guidelines are for gemologists learning to grade set gemstones.…

What do you know about birthstones? Take our short birthstone quiz and learn about the makeup, cutting, and value of these popular gemstones.

Probably fewer than a dozen creedite gems have ever been faceted. This rare mineral is rarer still as a cuttable crystal.

From bright, sunny colors to deep golden hues, yellow gemstones are warm and inviting. Learn how to assess the quality of yellow gems and find out…

How can new gem cutters succeed in the gemstone business? Learn how rough buying and custom cutting can give you a competitive edge.

Gemstone color measurements are hard to make with conventional color-order systems. Learn how recent colorimetry tech advances have improved…

Late Victorian Aesthetic Period jewelry marked a turn from weighty opulence to more delicate designs. Learn more about this popular antique style.…

The Mid-Victorian Period saw many changes in society and fashion. Learn what distinguishes Grand Period jewelry, particularly its opulent style…

The Romantic Period marked the start of the Victorian Era. Learn about the typical qualities of Romantic Period jewelry, including its sentimental…