sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7 (Mohs scale). Color: Deep red/brick red. Luster: Vitreous to dull. Crystal structure: Trigonal (microcrystalline/cryptocrystalline). Cleavage: None (conchoidal fracture). Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Deep red/brick red
Luster: Vitreous to dull

Identified July 16, 2026More sedimentary →

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Physical properties

Formation & geological history

Jasper is an opaque variety of chalcedony. It forms when silica-rich fluids permeate through volcanic ash or sedimentary deposits, where iron oxide (hematite) provides the red pigmentation. This specimen appears water-worn from a beach environment.

Uses & applications

Used primarily for ornamental purposes, lapidary arts, jewelry (cabochons), and as a landscape stone. Historically used for making tools due to its hardness and sharp edges when fractured.

Geological facts

Jasper was a favorite gem in the ancient world; its name can be traced back to Greek, Hebrew, and Persian roots for 'spotted or speckled stone'. It is known as a 'nurturing stone' in metaphysical circles.

Field identification & locations

Identify in the field by its deep red color, opacity (it will not let light through even at thin edges), and smooth, dull-to-waxy texture once dried. Commonly found in riverbeds and on beaches near volcanic or sedimentary outcroppings.

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