mineral

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7 on Mohs scale; Color: Yellow, tan, ochre with banding; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None/Conchoidal fracture; Specific gravity: 2.58-2.91.

Hardness: 6
Color: Yellow, tan, ochre with banding
Luster: Vitreous to dull

Identified May 25, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids permeate porous volcanic or sedimentary rocks. The yellow coloration is primarily due to goethite or other iron hydroxide inclusions. Can form in almost any geological age.

Uses & applications

Used primarily in lapidary arts for cabochons, beads, and decorative carvings. It is also used as a gemstone in jewelry and collected by mineral enthusiasts for its unique patterns.

Geological facts

Jasper has been used as a gemstone since antiquity; it is mentioned in several ancient texts and was used for seals in Crete around 1800 BC. Yellow jasper is often called the 'stone of endurance'.

Field identification & locations

Identify by its waxy luster, smooth water-worn surface (if found in rivers), and opaque nature. It will scratch glass but cannot be scratched by a steel knife. Commonly found in riverbeds and desert environments.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

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Nephrite Jade

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

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mineral