mineral

Green Agate

Cryptocrystalline Quartz (SiO2)

Hardness: 6.5-7 on the Mohs scale. Color: Deep green to emerald green with typical banded or cloudy white translucency. Luster: Waxy to vitreous. Crystal structure: Trigonal (microcrystalline). Cleavage: None. Specific gravity: 2.58–2.64.

Hardness: 6
Luster: Waxy to vitreous

Identified June 22, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Agates primarily form in cavities within volcanic or metamorphic rocks. Silica-rich fluids precipitate in layers over long geological periods, often millions of years. This specimen shows typical concentric or vein-like silica deposition.

Uses & applications

Primarily used in jewelry for cabochons, rings, and pendants. Also used for ornamental carvings, mortar and pestles due to hardness, and collecting.

Geological facts

Agate is named after the Achates River in Sicily, where it was first discovered. Green agate is often historically associated with the 'eyes' of protection and prosperity in various cultures.

Field identification & locations

Identified in the field by its hardness (scratches glass), waxy luster on fractured surfaces, and characteristic translucency or banding. Commonly found in Brazil, India, and the USA.