mineral
Green Quartz (Aventurine or Prase)
Silicon Dioxide (SiO2) with inclusions
Hardness: 7 (Mohs scale), Color: Dull green to translucent grayish-green, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Dull green to translucent grayish-green, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or as a component of metamorphic rocks. The green color is typically caused by inclusions of minerals like fuchsite mica, actinolite, or chlorite.
Uses & applications
Used frequently for lapidary work, decorative carvings, landscaping, and as a collector's specimen. In metaphysical communities, it is often used as a 'healing crystal.'
Geological facts
While often confused with Jade, green quartz is much harder. 'Aventurine' specifically refers to quartz that exhibits aventurescence—a shimmering effect caused by platy mineral inclusions.
Field identification & locations
Identify in the field by its hardness (it will scratch glass) and its lack of visible cleavage. Commonly found on beaches or in riverbeds where water has smoothed the edges of the parent rock fragments.
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Mineral/Rock