gemstone

Blue Impression Jasper beads

Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, opaque to slightly translucent, sky-blue with brown or rust-colored matrix veining, and a waxy to dull luster. It is cryptocrystalline, lacks visible cleavage, and commonly has a specific gravity near 2.6.

Identified August 7, 2026More gemstone →

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Physical properties

Formation & geological history

Formed when silica-rich fluids replaced or cemented volcanic or sedimentary material, with iron-rich inclusions creating the brown patterns; the beads are polished and drilled human-processed specimens. “Impression jasper” is a commercial lapidary name rather than a precise mineral species.

Uses & applications

Used for beads, cabochons, carvings, and ornamental jewelry; it has little industrial value. Retail value is commonly about $10–$40 for a strand, depending on bead size, pattern, and finish.

Geological facts

The blue coloration may result from finely disseminated minerals or commercial enhancement, and trade names are inconsistently applied. Natural patterning varies strongly between pieces.

Field identification & locations

Identify it by its opaque blue body, irregular rusty matrix, glassy-to-waxy polish, and hardness that resists scratching by steel. Similar blue dyed chalcedony or man-made glass should be checked with magnification, specific gravity, and a reputable gem tester; common jasper sources include Madagascar, Indonesia, China, and the western United States.