sedimentary
Crazy Lace Agate
Chalcedony (SiO2) with microcrystalline quartz
Hardness: 6.5-7 Mohs; Color: Gray, white, and translucent patterns; Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.64
- Hardness
- 6
- Color
- Gray, white, and translucent patterns
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 6.5-7 Mohs; Color: Gray, white, and translucent patterns; Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.64
Formation & geological history
Formed during the Cretaceous period approximately 65 to 90 million years ago. It settled in crevices and cavities of volcanic rock where silica-rich groundwater deposited mineral layers over time.
Uses & applications
Primarily used for lapidary arts, jewelry (cabochons and beads), carvings, and as a popular meditation stone in metaphysical circles.
Geological facts
Often called the 'Laughter Stone' or 'Mexican Lace Agate,' it is specifically associated with the state of Chihuahua, Mexico. Its complex swirling patterns are caused by iron and aluminum inclusions.
Field identification & locations
Identify in the field by its distinct 'lace' patterns and orbicular banding. It is exclusively found in Northern Mexico, specifically in the Chihuahua region.
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