mineral
Green Quartz (Prasiolite)
Crystalline Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Pale leek-green to light yellowish-green; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture).
- Hardness
- 7 on Mohs scale
- Color
- Pale leek-green to light yellowish-green
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Pale leek-green to light yellowish-green; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture).
Formation & geological history
Formed in igneous and metamorphic rocks through hydrothermal processes. While natural green quartz is rare, it typically occurs when amethyst-bearing rocks are subjected to natural geothermal heating or volcanic activity.
Uses & applications
Primarily used as a gemstone in jewelry, for lapidary work, and by mineral collectors for its unique aesthetic and metaphysical associations.
Geological facts
Natural green quartz is exceptionally rare; most green quartz on the market is actually purple amethyst that has been heat-treated to change its color. This specific specimen appears to be the rare naturally occurring or raw variety known as Prasiolite.
Field identification & locations
Identify in the field by its hardness (scratches glass), lack of cleavage, and translucent green hue. Common locations include Brazil, Namibia, and certain areas in Poland and Canada.
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