Dyed Agate
Chalcedony var. Agate (Cryptocrystalline Quartz) · Decorative Stone / Semi-Precious Gemstone
Crystal System
Trigonal/Hexagonal system (Microcrystalline); habit is typically nodules or massive with banding.
Mineral Group
Silicates (Tectosilicate group)
Chemical Formula
SiO2 (Silicon Dioxide) with artificial dye pigments
Formation Process
Hydrothermal/Sedimentary; forms in volcanic rock cavities or sedimentary rocks through silica deposition. The pink color is secondary (anthropogenic dyeing).
About This Crystal
Tumbled, polished stone showing a saturated neon/magenta pink color. Translucent to nearly opaque with a vitreous to waxy luster. Concentrated dye is visible in internal fractures and surface micro-pits.
Physical Characteristics
Pink body color, white streak (if natural), no cleavage, conchoidal fracture, 2.60–2.65 specific gravity, non-magnetic. May show bright pink fluorescence if reactive dyes were used.
Optical Properties
Refractive index of ~1.544; doubly refractive (aggregate). No natural pleochroism. The 'fire' is non-existent; primary feature is concentrated color zoning from dye.
Hardness & Durability
Origin Region
Brazil and Uruguay are major sources for natural agate geode slices and nodules which are then dyed globally.
Hardness & Durability
Mohs hardness 6.5–7. Tough and durable for jewelry, though the dye may be sensitive to heat and chemicals.
Care & Maintenance
Clean with warm soapy water; avoid ultrasonic or steam cleaners as they may leach dye. Store away from direct sunlight to prevent bleaching of the artificial pigment.
Rarity & Value
Very common; low value. Price usually ranges from $1–$5 for tumbled stones. The intense color is a result of mass-produced chemical treatment.
Special Characteristics
Artificially enhanced color-saturation; features 'dye-traps' where dark magenta pigment pools in fissures and less permeable layers of the chalcedony.
Lore & History
Historically, Agates have been used for amulets since Neolithic times. In modern crystal healing, pink agate is associated with the heart chakra and emotional soothing, though many purists prefer untreated stones.