sedimentary

Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with iron oxide and silicate impurities

Hardness: 6.5-7 on Mohs scale. Color: Mustard yellow, yellowish-brown, dark green to greenish-grey bands. Luster: Waxy to vitreous when polished. Crystal Structure: Trigonal (microcrystalline/cryptocrystalline quartz). Cleavage: None (conchoidal fracture). Specific Gravity: ~2.6.

Hardness: 6
Luster: Waxy to vitreous when polished

Identified July 25, 2026More sedimentary →

Explore Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions in the encyclopedia →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich fluids in sedimentary or low-grade metamorphic environments, often with iron oxide minerals providing yellow hues and chlorite or epidote creating green banding.

Uses & applications

Polished tumbled stone used in lapidary arts, jewelry, cabochons, metaphysical collections, and ornamental carvings.

Geological facts

Jasper is an opaque variety of chalcedony. The name comes from the Greek word 'iaspis', meaning spotted stone.

Field identification & locations

Identify by its hardness (scratches steel), smooth waxy feel, opacity, and distinctive yellow and green banding. Commonly found in riverbeds, gravel deposits, and volcanic terrains worldwide (e.g., USA, Madagascar, India, Brazil).

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