The world of rare gemstones and crystals is a treasure trove of beauty and fascination. Taaffeite, with its unique history ...

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.

The color should be evenly distributed throughout ... repeating pattern called crystal systems. While some gemstones are ...

Precious stones gifted to the museum by Ronald Winston, son of distinguished jeweler and gem collector Harry Winston.