Mineral (Variety of Quartz)
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusion of Mica
Hardness: 7 Mohs; Color: Muted yellow to golden orange; Luster: Vitreous to waxy; Crystal Structure: Trigonal (often massive); Cleavage: None; Specific Gravity: 2.63 - 2.65. Notable for 'aventurescence' (inner shimmer).
- Hardness
- 7 Mohs
- Color
- Muted yellow to golden orange
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Muted yellow to golden orange; Luster: Vitreous to waxy; Crystal Structure: Trigonal (often massive); Cleavage: None; Specific Gravity: 2.63 - 2.65. Notable for 'aventurescence' (inner shimmer).
Formation & geological history
Formed in metamorphic environments through the recrystallization of quartz grains and secondary minerals like mica or iron oxides, which give it its yellow hue. Commonly found in Precambrian rocks.
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), decorative carvings, and as a popular semi-precious stone for gemstone collectors and metaphysical practitioners.
Geological facts
Yellow aventurine is often confused with Citrine, but it can be distinguished by its internal mica inclusions and more opaque appearance. The name 'Aventurine' is derived from the Italian 'a ventura,' meaning 'by chance.'
Field identification & locations
Identify by its characteristic internal glints (aventurescence) and its ability to scratch glass. Commonly sourced from Brazil, India, and Russia. For collectors, look for uniform color and high translucency.
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