mineral
Aventurine (Tan/Cream colored)
Quartz (SiO2) with mineral inclusions
AI-generated identification · may be incorrectHardness: 7 (Mohs), Color: Tan/Cream, Luster: Vitreous to waxy, Crystal structure: Trigonal/Microcrystalline, Specific gravity: 2.64-2.69
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Physical properties
Hardness: 7 (Mohs), Color: Tan/Cream, Luster: Vitreous to waxy, Crystal structure: Trigonal/Microcrystalline, Specific gravity: 2.64-2.69
Formation & geological history
Formed in magmatic and metamorphic environments where quartz-rich fluids crystallize. The tan color is often due to inclusions of mica (muscovite) or iron oxides.
Uses & applications
Jewelry (beads, cabochons), ornate carvings, and as a popular stone for collectors interested in metaphysical properties.
Geological facts
While green is the most common color of aventurine, it naturally occurs in shades of orange, yellow, tan, and gray. The characteristic shimmer is called 'aventurescence'.
Field identification & locations
Identify by its hardness (scratches glass) and its subtle reflective particles when rotated under light. Found globally with large deposits in India, Russia, and Brazil.
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