mineral

Polished blue-green jasper beads

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; blue-green, gray, and brown mottled patterns with a waxy-to-glassy polish. Made of microscopic quartz crystals; no visible cleavage and typically specific gravity near 2.6.

Identified October 9, 2026More mineral →

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Physical properties

Formation & geological history

Formed as silica-rich fluids filled cavities or replaced rock, with iron and other impurities producing the colors. Jasper occurs in rocks of many geological ages; the pictured beads are cut and polished human-worked specimens.

Uses & applications

Used for beads, cabochons, ornaments, and small decorative objects; not generally used as a major construction material.

Geological facts

The photograph shows finished beads, so their exact jasper variety cannot be reliably determined from appearance alone.

Field identification & locations

Look for opaque, fine-grained stone with mottled or banded color and a glassy polish; common sources include India, Brazil, Australia, and the western United States. Individual beads or simple strands typically sell for about $5–$30, depending on quality and workmanship.