sedimentary
Green Jasper
Quartz (Silicon Dioxide, SiO2) with iron silicate inclusions
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Dull green with lighter mottled patches, Luster: Waxy to vitreous, Crystal Structure: Microcrystalline/Cryptocrystalline, Opaque transparency.
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Dull green with lighter mottled patches, Luster: Waxy to vitreous, Crystal Structure: Microcrystalline/Cryptocrystalline, Opaque transparency.
Formation & geological history
Formed via the deposition of silica-rich fluids in sedimentary or volcanic environments, often associated with the metamorphism of iron-rich sediments.
Uses & applications
Commonly used as a decorative stone, for cabochons in jewelry, and in folk medicine as a 'healing stone'. Historically used for making tools and seals.
Geological facts
Green jasper was highly prized in the ancient world; it was a preferred material for seals in the Indus Valley Civilization and was mentioned in various biblical texts as a valuable stone.
Field identification & locations
Identify by its characteristic 'flint-like' fracture, extreme hardness (it will scratch glass), and its dense, opaque green color. Commonly found in riverbeds or coastal beaches as water-worn pebbles.
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