Chalcedony

Name: Chalcedony

Mineral Category and Species: Silicate mineral, Cryptocrystalline variety of Quartz

Structure: Microcrystalline (Cryptocrystalline) Quartz

Chemical Composition: SiO₂

Color: Blue, white, gray, pink, yellow, green, brown, and other color

Optical Properties: Translucent to semi-transparent, waxy to vitreous luster, refractive index ~1.53

Hardness: 6.5 – 7

Types of Chalcedony: Agate, Carnelian, Onyx, Chrysoprase, Bloodstone, Jasper, Blue Chalcedony

Main Localities: Brazil, India, Madagascar, USA (Montana, Oregon), Namibia, Turkey, Mexico

Planet & Zodiac:

• Planet: Moon, Mercury
• Zodiac: Cancer, Sagittarius, Gemini

Uses:

• Jewelry
• Carvings and decorative objects
• Meditation and spiritual practices
• Seals and signet rings

Healing Properties:

• Promotes calmness and emotional balance
• Enhances intuition
• Soothes inflammation and improves circulation