sedimentary mineral

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Hardness: 6.5-7 (Mohs); Color: Banded patterns of cream, brown, gold, grey, and red; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline/cryptocrystalline); Cleavage: None; Specific Gravity: 2.60-2.65

Hardness: 6
Color: Banded patterns of cream, brown, gold, grey, and red
Luster: Waxy to vitreous

Identified March 14, 2026More sedimentary mineral →

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Physical properties

Formation & geological history

Formed in volcanic and sedimentary rock cavities during the Cretaceous period (roughly 65-90 million years ago) through the deposition of silica-rich groundwaters. It is often found as nodules or layered veins.

Uses & applications

Primarily used for ornamental carvings, jewelry (cabochons), lapidary work, and as a metaphysical healing stone. Its high hardness makes it suitable for wear.

Geological facts

Commonly known as the 'Laughter Stone.' It is famous for its intricate, swirling, lace-like patterns and is technically a variety of chalcedony. The most famous and nearly exclusive source for this specific variety is Chihuahua, Mexico.

Field identification & locations

Identify in the field by its distinct, complex multi-colored banding and waxy texture. It is found predominantly in northern Mexico and parts of the southwest United States. Collectors look for high contrast in the lace patterns and minimal cracking.

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