mineral
Green aventurine (likely)
Quartz with green fuchsite inclusions; SiO₂
AI-generated identification · may be incorrectPolished, opaque-to-translucent dark-green beads with a vitreous luster. Quartz hardness is 7 Mohs; hexagonal crystal structure, no cleavage, specific gravity about 2.6. The image alone cannot rule out dyed or imitation beads.
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Physical properties
Polished, opaque-to-translucent dark-green beads with a vitreous luster. Quartz hardness is 7 Mohs; hexagonal crystal structure, no cleavage, specific gravity about 2.6. The image alone cannot rule out dyed or imitation beads.
Formation & geological history
Aventurine forms when quartz crystallizes with fine mineral inclusions, commonly fuchsite mica. It develops in metamorphic or hydrothermal settings; its exact age depends on the deposit.
Uses & applications
Used for beads, jewelry, carvings, and decorative objects; generally an inexpensive ornamental stone.
Geological facts
Aventurine’s characteristic sparkle, called aventurescence, comes from reflective inclusions, though it may be subtle or absent in dark, polished beads.
Field identification & locations
Often sourced from India, Brazil, Russia, and Tanzania. Look for natural-looking color variation and tiny reflective inclusions; uniform color alone is not definitive. Similar beads may be dyed quartz or glass.
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