sedimentary
Green Jasper
Silicon Dioxide (SiO2) with impurities
Hardness: 6.5-7 on the Mohs scale; Color: Opaque olive-green; Luster: Vitreous to waxy; Structure: Microcrystalline (Cryptocrystalline); Fracture: Conchoidal; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Opaque olive-green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on the Mohs scale; Color: Opaque olive-green; Luster: Vitreous to waxy; Structure: Microcrystalline (Cryptocrystalline); Fracture: Conchoidal; Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediments, often associated with hydrothermal activity. It occurs in various geological ages ranging from the Precambrian to more recent eras.
Uses & applications
Primarily used for lapidary work, jewelry making (cabochons, beads), decorative ornaments, and as a healing stone in metaphysical communities.
Geological facts
Green Jasper was highly prized in the ancient world; it was mentioned in the Bible and used in the seals of ancient Mesopotamian civilizations. It is often referred to as a ‘rain bringer’ in historical folklore.
Field identification & locations
Identify by its characteristic waxy luster and inability to be scratched by a steel knife. Commonly found in riverbeds, coastal areas, and desert environments. Significant deposits are found in India, Russia, Brazil, and the USA (Oregon and Idaho).
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