sedimentary

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions (chlorite/iron silicates)

AI-generated identification · may be incorrect

Hardness of 6.5–7 on the Mohs scale; color ranges from deep olive green, forest green to yellow-green with mottled streaks; luster is vitreous to dull/waxy when polished; cryptocrystalline micro-quartz structure; no cleavage; specific gravity of approximately 2.58–2.64.

Identified October 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich fluids in volcanic cavities, sedimentary beds, or hydrothermal fractures, often absorbing micro-inclusions of chlorite, amphiboles, or clay minerals that impart its distinctive green hue.

Uses & applications

Popularly used as an ornamental gemstone, polished into decorative eggs, spheres, beads, cabochons, and used in holistic/lapidary arts.

Geological facts

Jasper has been carved by humans for thousands of years; in ancient civilizations, green jasper was revered as a talisman for rain, healing, and protection.

Field identification & locations

Identified by its high hardness (scratches glass and cannot be scratched by a steel nail), lack of translucency compared to chalcedony, and rich swirling patterns. Found widely in India, Madagascar, Russia, Brazil, and the United States.