mineral

Agate (Crazy Lace or Eye Agate)

Silicon Dioxide (SiO2)

Hardness: 6.5–7 on Mohs scale; Color: Creamy white with tan/brown circular patterns; Luster: Waxy to vitreous; Crystal Structure: Hexagonal (cryptocrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58–2.64

Hardness: 6
Color: Creamy white with tan/brown circular patterns
Luster: Waxy to vitreous

Identified April 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic pockets or sedimentary cavities where silica-rich groundwater deposits layers of microcrystalline quartz over thousands of years. The circular patterns (eyes) form via radial crystallization.

Uses & applications

Used in gemstone manufacturing, jewelry (beads, cabochons), ornamental carvings, and as a popular collector's specimen.

Geological facts

Agates are named after the Achates River in Sicily. The 'eye' patterns in this specific specimen are highly sought after by collectors who believe they offer protection in folklore.

Field identification & locations

Identify in the field by its waxy texture, circular banding, and hardness (it will scratch glass). Commonly found in riverbeds, desert washes, and near volcanic rock outcrops.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral