White Agate
Quartz var. White Chalcedony (Agate) · Semi-Precious Gemstone and Decorative Stone
Crystal System
Trigonal, microcrystalline quartz forming in massive, nodular, or tumbled habits
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2
Formation Process
Hydrothermal and secondary deposition processes filling cavities in volcanic or sedimentary rocks at low temperatures
About This Crystal
A tumbled, smooth, milky white specimen with a glossy polish, sub-translucent to opaque appearance, and a waxy to vitreous luster showing minor natural inclusions
Physical Characteristics
Milky white body color, white streak, conchoidal fracture, distinct absence of visible cleavage, specific gravity of approximately 2.60 to 2.65, brittle tenacity
Optical Properties
Biaxial positive with very low birefringence, aggregate optical character lacking pleochroism or significant dispersion
Hardness & Durability
Origin Region
Found worldwide including Brazil, India, Madagascar, Uruguay, and the United States
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness due to microcrystalline interlocking structure, durable for everyday jewelry wear
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals, prolonged direct sunlight, and abrasive cleaners
Rarity & Value
Common and widely accessible, highly affordable unless featuring rare natural banding or specific provenance, treatments like dyeing are occasionally used
Special Characteristics
Microcrystalline fibrous structure, smooth tumbled texture, potential for subtle banding or translucent light transmission
Lore & History
Historically used as an amulet for protection and grounding in ancient civilizations, associated with the crown chakra in modern crystal healing traditions to promote emotional balance and inner peace