metamorphic
Yellow Aventurine
Quartzite with inclusions (SiO2)
Hardness: 7 (Mohs scale); Color: Yellow to golden-orange; Luster: Vitreous to waxy with aventurescence; Crystal structure: Hexagonal/Trigonal (as microcrystalline aggregate); Cleavage: None; Specific gravity: 2.64-2.69
- Hardness
- 7 (Mohs scale)
- Color
- Yellow to golden-orange
- Luster
- Vitreous to waxy with aventurescence
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Physical properties
Hardness: 7 (Mohs scale); Color: Yellow to golden-orange; Luster: Vitreous to waxy with aventurescence; Crystal structure: Hexagonal/Trigonal (as microcrystalline aggregate); Cleavage: None; Specific gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of sandstone, where individual quartz grains recrystallize. The yellow color typically comes from inclusions of micas like muscovite or iron oxides.
Uses & applications
Commonly used for tumbled stones, decorative beads, cabochons for jewelry, and metaphysical healing practices.
Geological facts
Yellow aventurine is known for 'aventurescence,' a shimmering effect caused by platy mineral inclusions that reflect light. It is often mistaken for citrine or yellow jade by beginners.
Field identification & locations
Identify by its 'sugar-like' grainy texture under the surface and its internal shimmer. Commonly found in India, Brazil, and parts of Russia. Collectors look for even color saturation and a high density of shimmering inclusions.
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