mineral

Crazy Lace Agate

Silicon Dioxide (SiO2)

Hardness: 6.5-7 Mohs; Color: Multi-colored swirls of creamy brown, grey, black, and red; Luster: Waxy to vitreous; Crystal Structure: Trigonal (cryptocrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

Hardness: 6
Color: Multi-colored swirls of creamy brown, grey, black, and red
Luster: Waxy to vitreous

Identified June 17, 2026More mineral →

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Physical properties

Formation & geological history

Formed during the Cretaceous period (about 65-90 million years ago) from volcanic activity. It is created through rhythmic precipitation of silica within cavities of volcanic rock, such as basalt.

Uses & applications

Predominantly used for jewelry (cabochons, beads, and pendants), decorative carvings, lapidary arts, and as a popular specimen for rock collectors.

Geological facts

Also known as the 'Laughter Stone' or 'Happy Lace,' it is uniquely found in Chihuahua, Mexico. Its complex patterns are caused by iron and aluminum inclusions occurring during the agate's slow growth.

Field identification & locations

Identify in the field by its distinct 'lace' patterns and zig-zagging micro-crystalline bands. It is almost exclusively mined in Northern Mexico. For collectors, look for high contrast in the bands and minimal pitting.