mineral

Iron-rich jasper with quartz/chalcedony

Jasper (microcrystalline SiO₂), locally hematite/goethite-bearing

AI-generated identification · may be incorrect

Opaque, brecciated reddish-brown material with dark iron-oxide zones and a glassy red-brown translucent quartz/chalcedony area. Quartz hardness is about 7 Mohs; jasper has vitreous to dull luster and no cleavage, while iron oxides are softer and earthy.

Identified September 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich fluids cemented or replaced iron-rich sediments or volcanic material, producing red jasper and brecciation; likely Phanerozoic, though the exact age and locality cannot be determined from the image.

Uses & applications

Used for cabochons, carvings, lapidary specimens, and decorative stone; quality depends on color, pattern, polish, and translucency.

Geological facts

The red coloration commonly comes from hematite, whereas brown-yellow tones may reflect goethite or limonite. The apparent translucent red section could be jasper, chalcedony, or iron-stained quartz.

Field identification & locations

Look for dense opaque silica, conchoidal fracture, waxy-to-glassy luster, and red streaking; it should not fizz with dilute acid. Common sources include India, Madagascar, Brazil, Australia, and the western United States.