metamorphic
Yellow Aventurine
Silicon Dioxide (Quartz with inclusions of Mica or Pyrite), SiO2
Hardness: 7 Mohs; Color: Yellow to golden orange; Luster: Vitreous to waxy; Crystal Structure: Trigonal (often massive); Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Yellow to golden orange
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Yellow to golden orange; Luster: Vitreous to waxy; Crystal Structure: Trigonal (often massive); Cleavage: None; Specific Gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where mineral inclusions like muscovite or phlogopite create its characteristic shimmer (aventurescence).
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), metaphysical practices, and decorative carvings.
Geological facts
Yellow aventurine is unique among the aventurine family for its golden hue, which is typically caused by inclusions of mica or iron-bearing minerals. Its name comes from the Italian 'a ventura', meaning 'by chance'.
Field identification & locations
Identify by its waxy-to-glassy luster and the slight sparkle (aventurescence) visible under bright light. Found in India, Brazil, and Russia. Often used by collectors as an affordable alternative to yellow jade or citrine.
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