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.

Gemstones are naturally occurring mineral ... and revitalization. Available in many colors, it is a stone of renewal, helping ...

Take a leisurely hike along one of the many scenic trails ... seek out the hidden gems of America. The colors of autumn truly shine. From the peaceful forests of the Great Smoky Mountains to ...