Quartz, chalcedony, and agate are related stones. I’m sure you know of quartz, an abundant mineral that comes in many beautiful varieties. Several types of quartz are semi-precious gemstones, including citrine and amethyst. Chalcedony is closely related to quartz, but in addition to quartz it contains another mineral called moganite. When we refer to chalcedony,… Continue reading Mythic Monday: Crystals and Gemstones – Yellow Agate by Flossie Benton Rogers