sedimentary

Green Jasper

Microcrystalline Quartz (SiO2)

Hardness: 6.5 to 7 on the Mohs scale. Color ranges from pale sage to deep forest green, often with mottled or spotted patterns. Luster is vitreous to dull. Crystal structure is trigonal (microcrystalline/cryptocrystalline quartz). Cleavage is none, fracture is conchoidal. Specific gravity is 2.58 to 2.91.

Hardness: 6

Identified August 1, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the hydrothermal deposition or chemical precipitation of silica-rich solutions in sedimentary environments or volcanic ash beds. Often associated with ancient ocean floors and hydrothermal vents over millions of years.

Uses & applications

Commonly used for lapidary work, cabochons, beads, ornamental carvings, and in metaphysical practices for grounding and tranquility.

Geological facts

Jasper has been used since ancient times for talismans, seals, and weaponry (such as arrowheads). Green varieties were particularly prized by ancient Egyptians and Greeks for carving amulets.

Field identification & locations

Identify in the field by its hardness (scratches glass), waxy to dull luster, conchoidal fracture, and opaque green color. Found worldwide, with notable deposits in India, Russia, Brazil, and the western United States.