Green Banded Agate

Physical Properties

Hardness: 6.5-7 on Mohs scale; Color: Varying shades of green, cream, and brown; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.60-2.65

Formation & Geological History

Formed in cavities of volcanic rock (basalt) or ancient lavas. Silica-rich groundwater percolates through voids and deposits concentric layers over thousands of years.

Uses & Applications

Commonly used for lapidary arts, jewelry (beads, cabochons), architectural accents, and spiritual or decorative collecting.

Geological Facts

The name Agate comes from the Achates River in Sicily. Though naturally occurring, many bright green specimens on the market are artificially dyed to enhance their colors.

Field Identification & Locations

Identify by its characteristic banding and translucent nature. Unlike glass, it cannot be scratched by a steel knife. Commonly found in Brazil, India, and the United States (Lake Superior region).

Identified on: 4/13/2026

Mode: Standard