Aventurine (Green)

Physical Properties

Hardness: 6.5-7 (Mohs scale), Color: Green with shimmering spots, Luster: Vitreous to waxy, Crystal structure: Trigonal/Microcrystalline, Cleavage: None, Specific gravity: 2.64-2.69

Formation & Geological History

Formed through the regional metamorphism of sandstone into quartzite, where high pressure and heat allow mica minerals to recrystallize and align, creating the shimmering effect.

Uses & Applications

Primarily used in jewelry (beads, cabochons), ornamental carvings, landscaping, and metaphysical collecting.

Geological Facts

The shimmering effect seen in Aventurine is called 'aventurescence,' caused by platy inclusions of green fuchsite mica. It was named after 'a ventura' (by chance), a Venetian glass discovery in the 1700s.

Field Identification & Locations

Identify in the field by its distinct mica glitter, grainy texture compared to jade, and inability to be scratched by a steel knife. Found commonly in Brazil, India, and Russia.

Identified on: 4/27/2026

Mode: Standard