mineral

Banded Agate (Crazy Lace/Mexican Agate Variety)

Silicon Dioxide (SiO2)

Hardness: 6.5-7.0 (Mohs); Color: Multi-colored earthy tones including tan, orange, and red; Luster: Waxy to vitreous; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

Hardness: 6
Color: Multi-colored earthy tones including tan, orange, and red
Luster: Waxy to vitreous

Identified April 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic host rocks through the deposition of silica from groundwater into cavities. Most notable varieties are from the Cretaceous period (approx. 65-90 million years old).

Uses & applications

Primarily used for lapidary arts, jewelry, carvings, and as decorative collector specimens due to its intricate patterns.

Geological facts

The detailed patterns in crazy lace agate are caused by iron and aluminum inclusions. It is often called the 'Laughter Stone' or 'Happy Lace' in metaphysical circles.

Field identification & locations

Look for microcrystalline quartz with concentric, wavy banding or 'eyes.' Commonly found in Chihuahua, Mexico. Can be identified by its hardness (it will scratch glass) and lack of cleavage.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

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