Green Quartz / Aventurine

Physical Properties

Hardness: 7 on Mohs scale; Color: Pale green to forest green; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.63 - 2.65

Formation & Geological History

Formed through the metamorphism of sandstone into quartzite, where impurities such as fuchsite mica impart a green color. It typically forms in orogenic metamorphic belts.

Uses & Applications

Used primarily in jewelry (cabochons, beads), decorative carvings, aquarium gravel, and as a healing stone in metaphysical practices.

Geological Facts

Aventurine displays a unique shimmering effect called 'aventurescence' caused by tiny platy mineral inclusions that reflect light. It is often confused with jade or emerald by non-experts.

Field Identification & Locations

Identify in the field by its hardness (scratches glass), lack of cleavage, and the presence of tiny sparkly inclusions (fuchsite). Commonly found in Brazil, India, Russia, and Tanzania.

Identified on: 4/18/2026

Mode: Standard