Agate (Crazy Lace or Eye Agate)

Physical Properties

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

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.

Identified on: 4/25/2026

Mode: Standard