Blue Lace Agate (Dyed Chalcedony)
Quartz var. Chalcedony · Semi-Precious Gemstone
Crystal System
Trigonal, microcrystalline habit
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2
Formation Process
Hydrothermal and sedimentary deposition in cavities of volcanic rocks
About This Crystal
Spherical beads polished to a vitreous luster, featuring vibrant cobalt blue coloration contrasting with white, milky translucent zones, strongly suggesting synthetic dyeing of natural chalcedony or agate.
Physical Characteristics
Blue and white body color, white streak, conchoidal fracture, cleavage absent, specific gravity approximately 2.60 to 2.65, brittle tenacity
Optical Properties
Biaxial positive with very low birefringence, microcrystalline aggregate showing aggregate polarization under cross-polarized light
Hardness & Durability
Origin Region
Worldwide, particularly Brazil and India
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness due to microcrystalline interlocking structure, suitable for daily jewelry wear
Care & Maintenance
Clean with warm soapy water and a soft cloth, avoid prolonged exposure to harsh chemicals, high heat, and direct sunlight to prevent dye fading
Rarity & Value
Common, inexpensive when treated or dyed, widely available as tumbled stones and beaded jewelry
Special Characteristics
Banded patterns characteristic of chalcedony, though the intense blue coloration indicates artificial enhancement via dye treatment
Lore & History
Often associated with calming energy, communication, and the throat chakra in modern crystal healing traditions, though these are metaphysical concepts rather than scientific properties