mineral
Green aventurine (likely)
Quartz, SiO₂, with green fuchsite inclusions
AI-generated identification · may be incorrectOpaque to translucent green, vitreous-to-dull luster; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage and conchoidal fracture. The pictured rough, rounded piece is not diagnostic, so identification is tentative.
Identified More mineral →
Explore Green aventurine (likely) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Opaque to translucent green, vitreous-to-dull luster; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage and conchoidal fracture. The pictured rough, rounded piece is not diagnostic, so identification is tentative.
Formation & geological history
Typically forms as quartz-bearing veins or metamorphic rocks; green color comes from tiny mica inclusions. Quartz deposits span many geological ages.
Uses & applications
Used for beads, carvings, decorative objects, and inexpensive jewelry.
Geological facts
Aventurine’s subtle glitter, called aventurescence, comes from reflective mineral inclusions; it may be hard to see in rough pieces.
Field identification & locations
Often found in India, Brazil, Russia, and elsewhere. Look for a granular, sparkly appearance and test hardness only on an inconspicuous spot; color alone cannot distinguish it from other green minerals.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral