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 believed to enhance qualities and bring balance to each zodiac sign. Aries benefits from Red Jasper and Carnelian, Taurus from Rose Quartz and Emerald. Gemini, Cancer, Leo, Virgo, Libra, ...