sedimentary
Lace Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Hardness: 6.5-7 on Mohs scale. Color: White, cream, tan with swirling patterns. Luster: Waxy to vitreous. Crystal Structure: Trigonal (microcrystalline). Cleavage: None. Specific Gravity: 2.58-2.64.
- Hardness
- 6
- Color
- White, cream, tan with swirling patterns
- Luster
- Waxy to vitreous
Identified More sedimentary →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 on Mohs scale. Color: White, cream, tan with swirling patterns. Luster: Waxy to vitreous. Crystal Structure: Trigonal (microcrystalline). Cleavage: None. Specific Gravity: 2.58-2.64.
Formation & geological history
Formed through the deposition of silica from groundwater in cavities within volcanic or sedimentary rocks. The distinctive lace-like patterns are created by rhythmic precipitation of different mineral layers over thousands of years.
Uses & applications
Primarily used for lapidary work, jewelry making (cabochons), interior decoration, and as a popular focus for metaphysical crystal collectors.
Geological facts
The intricate, swirling patterns are often referred to as 'parrallax' effects in high-quality specimens. While Mexican Crazy Lace is the most famous variety, white lace agates are found globally.
Field identification & locations
Identify in the field by its characteristic concentric or 'lacey' banding and waxy texture when broken. It will scratch glass but cannot be scratched by a steel knife. Common in Brazil, Mexico, and the Lake Superior region.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Arenite
sedimentary