mineral
Tumbled green aventurine (likely)
Quartz, SiO₂, with possible fuchsite or other mica inclusions
AI-generated identification · may be incorrectSmooth, rounded, pale mint-green body with a waxy to vitreous luster; quartz hardness is about 7 Mohs, no obvious cleavage, and specific gravity is approximately 2.65. The uniform appearance and lack of visible sparkle make identification uncertain from the photograph.
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Physical properties
Smooth, rounded, pale mint-green body with a waxy to vitreous luster; quartz hardness is about 7 Mohs, no obvious cleavage, and specific gravity is approximately 2.65. The uniform appearance and lack of visible sparkle make identification uncertain from the photograph.
Formation & geological history
Aventurine forms when quartz crystallizes with disseminated green mica, commonly in metamorphic or hydrothermal environments; specimens may be Precambrian to younger depending on locality. The pictured piece is polished/tumbled.
Uses & applications
Used for carvings, beads, cabochons, decorative stone, and inexpensive jewelry; it has little construction use in this form.
Geological facts
Green aventurine is commonly confused with green chalcedony, jade, serpentine, and dyed quartzite. Strong aventurescence—tiny reflective sparkles—is typical but may be absent in pale material.
Field identification & locations
Common sources include India, Brazil, Russia, and Tanzania. Check hardness with care, inspect for mica sparkle under a flashlight, and use a refractometer or microscope for confirmation; color alone is not diagnostic.
