mineral

Green jasper (possibly dyed or coated)

Microcrystalline quartz, SiO₂; jasper is an opaque variety of chalcedony

AI-generated identification · may be incorrect

Smooth, rounded, opaque lime-green bead with dark speckles and a glossy surface. Quartz hardness is 6.5–7 Mohs, trigonal crystal structure, and no cleavage; color and surface finish may be enhanced.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms as silica-rich fluids fill cavities or replace material in sedimentary and volcanic rocks; its geological age varies by deposit. The bead’s bright, uniform green may result from human treatment, which cannot be confirmed from the image.

Uses & applications

Used for beads, cabochons, and decorative objects; jasper is also collected as an ornamental stone.

Geological facts

Jasper is a variety of chalcedony, made of microscopic quartz crystals; iron and other inclusions create its colors and patterns.

Field identification & locations

A photograph cannot securely distinguish jasper from other green stones or treated materials. Check hardness and inspect for dye concentrated in cracks; common jasper sources include India, Brazil, and the United States.