Metamorphic rock
Yellow Aventurine
Silicon Dioxide (Quartz) with inclusions (SiO2)
Hardness: 7 (Mohs); Color: Pale yellow to golden honey; Luster: Vitreous to waxy with aventurescence; Crystal structure: Trigonal; Cleavage: None; Specific Gravity: 2.63 - 2.65
- Hardness
- 7 (Mohs)
- Color
- Pale yellow to golden honey
- Luster
- Vitreous to waxy with aventurescence
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Physical properties
Hardness: 7 (Mohs); Color: Pale yellow to golden honey; Luster: Vitreous to waxy with aventurescence; Crystal structure: Trigonal; Cleavage: None; Specific Gravity: 2.63 - 2.65
Formation & geological history
Metamorphic process where quartz sandstones are subjected to heat and pressure. The characteristic shimmer (aventurescence) comes from mica or hematite inclusions trapped during crystallization.
Uses & applications
Predominantly used for ornamental purposes, jewelry making, lapidary carvings (like stars and hearts), and by metaphysical collectors for 'healing' properties.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', originally referring to glass produced with accidental copper filings that mimicked the stone's look.
Field identification & locations
Identify by its grainy, sugary texture under the surface and its signature shimmer. Common in Brazil, India, and Russia. For collectors, look for uniform color and strong light reflection from internal inclusions.
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