White Lace Agate
Chalcedony var. Agate · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal (Hexagonal) - Microcrystalline in massive/banded habit
Mineral Group
Silicates; Tectosilicate subgroup; Quartz group
Chemical Formula
SiO2 (Silicon Dioxide) with trace iron and manganese
Formation Process
Sedimentary or Hydrothermal deposition of silica-rich fluids into voids (vugs) in volcanic rock at low temperatures and pressures.
About This Crystal
A variety of banded chalcedony displaying delicate, lace-like patterns. White to light gray body color with intricate wavy bands, layers, and occasionally faint yellowish or reddish inclusions. Semi-translucent to opaque with a vitreous to waxy luster.
Physical Characteristics
White/gray body with white streak; massive to botryoidal form; no cleavage; conchoidal fracture; specific gravity 2.60-2.65; non-magnetic; often shows modest white or yellowish fluorescence under UV light.
Optical Properties
Refractive index 1.530-1.543; double refraction; lacks pleochroism and dispersion; displays distinct translucency differences between bands.
Hardness & Durability
Origin Region
Notably Chihuahua, Mexico; commonly found in volcanic host rocks and geodes.
Hardness & Durability
6.5 - 7 on the Mohs scale; high toughness due to microcrystalline structure; stable under most conditions.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals like hydrofluoric acid; generally light-stable but avoid prolonged high heat; store separately from diamonds or topazes to prevent scratching.
Rarity & Value
Common to Uncommon; value is driven by the complexity of the 'lace' pattern and transparency; generally affordable as polished points or cabochons; rarely treated though it can be dyed.
Special Characteristics
Distinctive 'lace-like' or 'crazy' banding patterns caused by rhythmic crystallization of silica; occasional drusy quartz pockets within the bands.
Lore & History
Traditionally referred to as the 'Laughter Stone' or 'Happy Lace'; historically used in amulets for protection and strength. In modern metaphysical practice, associated with the crown and third-eye chakras, believed to promote inner peace, mental agility, and emotional balance.