sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Yellow to brownish-yellow; Luster: Dull to vitreous/waxy; Crystal System: Trigonal (Microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Yellow to brownish-yellow
Luster: Dull to vitreous/waxy

Identified June 4, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Yellow to brownish-yellow; Luster: Dull to vitreous/waxy; Crystal System: Trigonal (Microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the accumulation of fine-grained silica in sedimentary environments or hydrothermal veins. Its yellow color is derived from iron hydroxide (goethite) inclusions during the solidification process.

Uses & applications

Used primarily in lapidary work for cabochons, beads, and decorative carvings. It is also used as a gemstone in jewelry and collected as a healing stone in metaphysical communities.

Geological facts

Jasper is an opaque variety of chalcedony. It has been used since ancient times for cylinder seals and amulets, and was often mentioned in various ancient religious texts for its protective qualities.

Field identification & locations

Identify by its hardness (will scratch glass), opaque nature, and smooth, waxy texture when polished. Commonly found in riverbeds or coastal areas as rounded pebbles. Major sources include India, Brazil, and the USA.