mineral

Yellow Jasper

Silicon dioxide (SiO2)

Hardness: 6.5-7 (Mohs); Color: Mustard yellow to brownish-yellow; Luster: Vitreous to waxy; Crystal structure: Hexagonal (microcrystalline); Cleavage: None; Specific gravity: 2.58–2.91

Hardness: 6
Color: Mustard yellow to brownish-yellow
Luster: Vitreous to waxy

Identified June 18, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Mustard yellow to brownish-yellow; Luster: Vitreous to waxy; Crystal structure: Hexagonal (microcrystalline); Cleavage: None; Specific gravity: 2.58–2.91

Formation & geological history

Formed from the deposition of silica from water into cavities within volcanic or sedimentary rocks. Over millions of years, impurities like clay or iron oxides create the distinctive yellow hue.

Uses & applications

Used primarily for jewelry (cabochons, beads), decorative carvings, and as a popular stone for lapidary tumbling and metaphysical collections.

Geological facts

Jasper is an opaque variety of chalcedony. The yellow variety specifically gets its color from high concentrations of goethite or limonite. Historically, it was known as a stone of endurance.

Field identification & locations

Identify by its opacity (even when held to light), waxy feel when polished, and resistance to being scratched by a steel blade. Commonly found in riverbeds or coastal areas in India, Russia, and the USA.