mineral
Green Quartz (Aventurine or Prase)
Silicon Dioxide (SiO2) with inclusions
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy; Structure: Hexagonal (trigonal); Grainy/Sugary texture.
- Hardness
- 7 Mohs
- Color
- Pale to medium green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy; Structure: Hexagonal (trigonal); Grainy/Sugary texture.
Formation & geological history
Formed in magmatic rocks or metamorphic environments through hydrothermal processes. The green color usually results from inclusions of minerals like fuchsite (chrome-mica).
Uses & applications
Used extensively in lapidary work for carvings, beads, jewelry, and as decorative stone in landscaping or water features.
Geological facts
Aventurine is known for its 'aventurescence,' which is a glittering effect caused by tiny mineral inclusions reacting with light.
Field identification & locations
Identify by its hardness (will scratch glass) and green color. Commonly found in riverbeds or mountain ranges in India, Brazil, and Russia. Collectors should look for uniform color and absence of large cracks.
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