mineral

Crazy Lace Agate

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Hardness: 6.5-7 Mohs; Color: Multi-colored bands of reds, greys, golds, and whites; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microscopic); Cleavage: None; Specific Gravity: 2.6-2.65.

Hardness: 6
Color: Multi-colored bands of reds, greys, golds, and whites
Luster: Waxy to vitreous

Identified March 23, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.5-7 Mohs; Color: Multi-colored bands of reds, greys, golds, and whites; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microscopic); Cleavage: None; Specific Gravity: 2.6-2.65.

Formation & geological history

Formed in volcanic cavities during the Cretaceous period (roughly 65-90 million years ago) through the rhythmic deposition of silica-rich ground fluids, often containing iron and manganese oxides that create the colorful patterns.

Uses & applications

Primarily used in jewelry (cabochons and beads), ornamental carvings, and as a popular specimen for crystal collectors and lapidary arts.

Geological facts

Also known as the 'Laughter Stone' or 'Mexican Lace Agate,' it is biologically unique to Northern Mexico. Its complex swirls and 'eyes' are formed by twisting fibers of chalcedony.

Field identification & locations

Identify by its intricate, chaotic banding and high polish. It is almost exclusively found in the state of Chihuahua, Mexico. For collectors, look for high contrast and sharp line definition with no visible fractures.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral