metamorphic
Yellow Aventurine (Yellow Quartzite)
Silicon Dioxide (SiO2) with inclusions
Hardness: 7 (Mohs scale); Color: Pale yellow to golden-orange; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (Microcrystalline); Cleavage: None; Specific gravity: 2.64-2.69
- Hardness
- 7 (Mohs scale)
- Color
- Pale yellow to golden-orange
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 (Mohs scale); Color: Pale yellow to golden-orange; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (Microcrystalline); Cleavage: None; Specific gravity: 2.64-2.69
Formation & geological history
Formed by the metamorphism of quartz-rich sandstone. The yellow hue is typically caused by inclusions of mica or iron minerals during the recrystalization process in metamorphic environments.
Uses & applications
Commonly used for tumbled stones, decorative ornaments, jewelry (beads and cabochons), and as a popular 'healing crystal' in the metaphysical community.
Geological facts
Aventurine is famous for 'aventurescence,' a shimmering effect caused by platy mineral inclusions. While green is the most common color, yellow occurs when different minerals like muscovite or pyrite are present during formation.
Field identification & locations
Identify by its waxy luster and hardness (it will easily scratch glass). It is commonly found in India, Brazil, and Russia. For collectors, look for a uniform yellow color and slight internal graininess typical of quartzite.
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