sedimentary

Amber-colored Jasper

Silicon Dioxide (SiO2)

Hardness: 6.5-7 (Mohs scale); Color: Yellowish-brown, mustard, or honey-gold; Luster: Vitreous to waxy (when polished); Structure: Microcrystalline quartz; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Yellowish-brown, mustard, or honey-gold
Luster: Vitreous to waxy (when polished)

Identified July 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediments. Over millions of years, the silica solidifies into a variety of chalcedony. The yellow/amber color is typically due to iron oxide (goethite or limonite) inclusions.

Uses & applications

Commonly used for lapidary work, cabochons, tumbled pocket stones, home decor ornaments, and decorative beads in affordable jewelry.

Geological facts

Jasper is an opaque variety of chalcedony. While people often associate jasper with red, the yellow variety shown here is frequently called 'Yellow Jasper' or 'Honey Jasper' and has been used for centuries in seals and ornaments.

Field identification & locations

Identify by its opacity (it does not transmit light even on thin edges), its smooth waxy feel, and its inability to be scratched by a steel knife. It is found globally, with significant deposits in India, Russia, and the USA.