Carnelian Agate with Druzy Quartz
Quartz var. Chalcedony (Agate/Carnelian) · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, microcrystalline fibrous chalcedony habit with a botryoidal central druzy cavity
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2
Formation Process
Low-temperature hydrothermal deposition or groundwater infiltration filling cavities in volcanic or sedimentary rocks, forming layer by layer via colloidal silica precipitation
About This Crystal
Polished slab featuring vibrant translucent reddish-orange carnelian surrounded by bands of chalcedony, enclosing a central vug containing white botryoidal and druzy quartz crystal formations and small hollow cavities
Physical Characteristics
Color ranges from deep red-orange to translucent white; white streak; no cleavage; conchoidal fracture; specific gravity around 2.60 to 2.65; brittle tenacity; vitreous to waxy luster
Optical Properties
Singly or micro-crystalline doubly refractive with aggregate birefringence, vitreous to waxy luster, translucent to semi-transparent transparency
Hardness & Durability
Origin Region
Brazil, India, Madagascar, and Uruguay, typically found in volcanic rock cavities and hydrothermal veins
Hardness & Durability
Mohs hardness of 6.5 to 7; good toughness due to microcrystalline interlocking structure; stable under normal conditions and suitable for jewelry use
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals and prolonged exposure to direct sunlight; store separately from harder stones to avoid scratching
Rarity & Value
Common to Uncommon depending on color saturation and unique inclusions; valued based on color vibrancy, translucency, and presence of druzy pockets; typically affordable to moderate price range
Special Characteristics
Features a central druzy quartz pocket, distinctive color zoning, and small hollow cavity formations within the chalcedony matrix
Lore & History
Historically used by ancient civilizations like the Egyptians and Romans for signet rings and talismans; associated in modern crystal healing traditions with vitality, motivation, and the sacral chakra, though these remain traditional beliefs