metamorphic
Green Aventurine (Quartz)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Hardness: 6.5-7 (Mohs); Color: Pale to deep green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.64-2.69; Features 'aventurescence' (shimmering effect).
- Hardness
- 6
- Color
- Pale to deep green
- Luster
- Vitreous to waxy
Identified More metamorphic →
Explore Green Aventurine (Quartz) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 (Mohs); Color: Pale to deep green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.64-2.69; Features 'aventurescence' (shimmering effect).
Formation & geological history
Formed through the metamorphism of quartz-rich sandstones (quartzites). The green color and shimmering quality are caused by platy inclusions of green chromium-bearing mica called fuchsite trapped during recrystallization.
Uses & applications
Primarily used for jewelry (cabochons, beads), decorative carvings, aquarium gravel, and as a popular 'healing crystal' or meditation stone.
Geological facts
Aventurine is often mistaken for jade due to its color, but its shimmering effect (aventurescence) caused by mica inclusions is a unique optical identifier. The name comes from the Italian 'a ventura,' meaning 'by chance.'
Field identification & locations
Identify in the field by its hardness (scratches glass), waxy luster, and tiny internal sparkling specks of mica. Commonly found in India, Brazil, Russia, and Tanzania.
More like this
