mineral

Crazy Lace Agate

Silicon Dioxide (Microcrystalline Quartz) - SiO2

Hardness: 6.5–7 on Mohs scale; Color: Multi-colored with whites, browns, reds, and yellows; Luster: Waxy to vitreous; Structure: Hexagonal/Trigonal (cryptocrystalline); Cleavage: None; Specific Gravity: 2.60–2.65

Hardness: 6
Color: Multi-colored with whites, browns, reds, and yellows
Luster: Waxy to vitreous

Identified April 2, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from groundwater in cavities within igneous rocks (primarily rhyolite). It involves complex rhythmic growth patterns during the Cretaceous period (approx. 65–90 million years ago).

Uses & applications

Popular for use in jewelry (cabochons, beads), decorative carvings, lapidary arts, and as a popular collector's specimen due to its unique patterns.

Geological facts

Known as the 'Laughter Stone' or 'Happy Lace,' it is uniquely found in the state of Chihuahua, Mexico. The 'lace' patterns are actually layers of chalcedony that have twisted and turned as they filled an irregular void.

Field identification & locations

Identify in the field by its distinct, complex swirling bands and 'botryoidal' (grape-like) or orbicular patterns when polished. It is exclusively found in Mexico. To identify, look for its high hardness and lack of reaction to acid.

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