sedimentary
Crazy Lace Agate
Chalcedony (SiO2 with inclusions)
Hardness: 6.5-7 (Mohs); Color: Multi-colored with swirling bands of yellow, grey, white, and brown; Luster: Waxy to vitreous; Crystal structure: Trigonal (microcrystalline); Cleavage: None/Conchoidal fracture.
- Hardness
- 6
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Multi-colored with swirling bands of yellow, grey, white, and brown; Luster: Waxy to vitreous; Crystal structure: Trigonal (microcrystalline); Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed primarily during the Cretaceous period roughly 65-90 million years ago, this agate is found in volcanic rock cavities where silica-rich fluids deposited layers over time, specifically in Chihuahua, Mexico.
Uses & applications
Commonly used in jewelry (pendants, beads), ornamental carvings, and holistic collecting. Due to its hardness, it is also popular for tumbled stones.
Geological facts
Known as the 'Laughter Stone' or 'Happy Lace,' it is famous for its intricate, zig-zag patterns and bright colors. It is a Mexican agate found only in Chihuahua.
Field identification & locations
Identified by its distinctive lace-like banding and varied color palette. Unlike regular banded agate, crazy lace features more complex, overlapping circular and angular patterns. It is almost exclusively found in the Sierra Madre Mountains.
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