mineral

Crazy Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Hardness: 6.5-7 on Mohs scale. Color: Multicolored with creamy whites, tans, grays, and occasionally reds or yellows. Luster: Waxy to vitreous. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline). Cleavage: None (conchoidal fracture). Specific Gravity: 2.58-2.64.

Hardness: 6
Luster: Waxy to vitreous

Identified June 16, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from groundwater in the cavities of igneous rocks. These specific specimens are typically from the Cretaceous period (65-90 million years ago), formed in volcanic areas where silica-rich fluids filled gas bubbles in lava.

Uses & applications

Primarily used in jewelry (beads, cabochons), ornamental carvings, and as a popular lapidary material for collectors and practitioners of crystal healing.

Geological facts

Known as the 'Laughter Stone' or 'Happy Lace,' it is associated with Mexican fiestas due to its vibrant patterns. Most high-quality Crazy Lace Agate is found specifically in Chihuahua, Mexico.

Field identification & locations

Identify by its intricate, 'crazy' swirling patterns and banded colors that often look like zig-zags or loops. In the field, look for chalcedony nodules in rhyolite formations. It takes a high polish and is very durable.

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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Metamorphic Rock

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