mineral

Yellow Jasper

Silicon Dioxide (SiO2) with Ferric Hydroxide impurities

Hardness: 6.5-7 on Mohs scale. Color: Mustard yellow to golden brown. Luster: Waxy to vitreous. Crystal Structure: Trigonal (Microcrystalline). Cleavage: None. Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Mustard yellow to golden brown
Luster: Waxy to vitreous

Identified April 11, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale. Color: Mustard yellow to golden brown. Luster: Waxy to vitreous. Crystal Structure: Trigonal (Microcrystalline). Cleavage: None. Specific Gravity: 2.58-2.91.

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediments. The yellow color comes from the inclusion of goethite or other iron oxides during the crystallization process.

Uses & applications

Commonly used for lapidary work, jewelry (cabochons, beads), decorative ornaments, and as a popular stone for tumbling and crystal healing practices.

Geological facts

Jasper is an opaque variety of chalcedony. It has been used since antiquity for seals and amulets. The name 'jasper' is derived from the Greek word 'iaspis', meaning 'spotted stone'.

Field identification & locations

Identify by its opaque nature (unlike translucent carnelian), smooth waxy feel when polished, and yellow streak. It is often found in river beds or as nodules in volcanic rock in regions like India, Madagascar, and the Western United States.

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